Adds changelog for v2.1, links in README and HTML

- updated the `changelog.py` script for 2.1
- created changelog for 2.1 in `2.1/changelog.html`
- added links to changelog in README.md (root and 2.1)
- added links to changelog in HTML docs (updated macro & regenerated)

2.1/README.md

@@ -1,6 +1,6 @@
 # DPV 2.1
 
-> ![Static Badge](https://img.shields.io/badge/DPV-version%202.1-green?labelColor=black) DPV 2.1 is the continued expansion of DPV 2.0's broadened scope regarding data and (AI) technologies and includes new draft extensions for jurisdictions, laws, and sectors. The article [Data Privacy Vocabulary (DPV) -- Version 2](https://arxiv.org/abs/2404.13426) describes the structure of DPV v2.0+ specifications in terms of its contents, methodology, current adoptions and uses, and future potential. It also describes the relevance and role of DPV in acting as a common vocabulary to support various regulatory (e.g. EU's DGA and AI Act) and community initiatives (e.g. Solid) emerging across the globe. A [Search Index](https://w3id.org/dpv/2.1/search) of all concepts from DPV and extensions is available. See the [v2 changelog](https://w3id.org/dpv/2.1/changelog) for more details. 
+> ![Static Badge](https://img.shields.io/badge/DPV-version%202.1-green?labelColor=black) DPV 2.1 is the continued expansion of DPV 2.0's broadened scope regarding data and (AI) technologies and includes new draft extensions for jurisdictions, laws, and sectors. The article [Data Privacy Vocabulary (DPV) -- Version 2](https://arxiv.org/abs/2404.13426) describes the structure of DPV v2.0+ specifications in terms of its contents, methodology, current adoptions and uses, and future potential. It also describes the relevance and role of DPV in acting as a common vocabulary to support various regulatory (e.g. EU's DGA and AI Act) and community initiatives (e.g. Solid) emerging across the globe. A [Search Index](https://w3id.org/dpv/2.1/search) of all concepts from DPV and extensions is available. See the [v2.1 changelog](https://w3id.org/dpv/2.1/changelog.html) for more details. 
 
 > **DPV v2.1-RC feedback/review period until FEB-16** The DPVCG welcomes feedback and review on the v2.1 Release Candidate containing DPV and related specifications until FEB-16, after which, these documents will be published unless unresolved major issues have been identified. Feedback/review can be e.g., suggestions for improvements, fixing grammar/typos, additional information and references, and technical changes to files. The DPVCG shall discuss all submitted feedback and will resolve in through the weekly meetings. To submit feedback, please use [GitHub issue#235](https://github.com/w3c/dpv/issues/235).
 

2.1/ai/ai-en.html

@@ -547,7 +547,7 @@
     <p>The AI extension extends the [[[DPV]]] and its [[[TECH]]] extension to represent AI techniques, applications, risks, and mitigations. The namespace for terms in <code>ai</code> is <a href="http://www.w3id.org/dpv/ai#"><code>https://www.w3id.org/dpv/ai#</code></a>. The suggested prefix for the namespace is <code>ai</code>. The AI vocabulary and its documentation are available on <a href="https://github.com/w3c/dpv">GitHub</a>.</p>
   </section>
     <div id="feedback-notice" class="notoc" style="background-color: #fbe9e9;border: 1px solid red;padding: 5px;">
-  <p><strong>DPV v2.1-RC feedback/review period until FEB-16</strong> The DPVCG welcomes feedback and review on the v2.1 Release Candidate containing DPV and related specifications until FEB-16, after which, these documents will be published unless unresolved major issues have been identified. Feedback/review can be e.g., suggestions for improvements, fixing grammar/typos, additional information and references, and technical changes to files. The DPVCG shall discuss all submitted feedback and will resolve in through the weekly meetings. To see what is included in v2.1 and a changelog, refer to <a href="https://github.com/w3c/dpv/blob/master/2.1/README.md">this link</a>.</p>
+  <p><strong>DPV v2.1-RC feedback/review period until FEB-16</strong> The DPVCG welcomes feedback and review on the v2.1 Release Candidate containing DPV and related specifications until FEB-16, after which, these documents will be published unless unresolved major issues have been identified. Feedback/review can be e.g., suggestions for improvements, fixing grammar/typos, additional information and references, and technical changes to files. The DPVCG shall discuss all submitted feedback and will resolve in through the weekly meetings. See the <a href="https://w3id.org/dpv/2.1/changelog.html">changelog</a> for changes.</p>
   <aside class="issue" data-number="235"></aside>
 </div>
 <div id="dpv-document-family" class="notoc">