Fix url for CC-BY-SA 4.0 license (#298)

Author: athoelke

docs/index.html

@@ -176,7 +176,7 @@ <h2 id="feedback">Feedback</h2>
 
 <h2 id="license">License</h2>
 
-<p>The latest versions of the PSA Certified APIs that are hosted on this website are licensed under the Creative Commons <a href="https://creativecommons.org/licenses/by/4.0">Attribution–Share Alike 4.0 International license</a> and <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>. Some earlier versions of the specifications are licensed under a non-confidential license from Arm.</p>
+<p>The latest versions of the PSA Certified APIs that are hosted on this website are licensed under the Creative Commons <a href="https://creativecommons.org/licenses/by-sa/4.0">Attribution–Share Alike 4.0 International license</a> and <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>. Some earlier versions of the specifications are licensed under a non-confidential license from Arm.</p>
 
 <p>Refer to individual documents for license details.</p>
 

site-src/index.md

@@ -74,7 +74,7 @@ The latest versions of the PSA Certified APIs that are hosted on this website ar
 
 Refer to individual documents for license details.
 
-[CC-BY-SA-4.0]:     https://creativecommons.org/licenses/by/4.0
+[CC-BY-SA-4.0]:     https://creativecommons.org/licenses/by-sa/4.0
 [APACHE-2.0]:       https://www.apache.org/licenses/LICENSE-2.0
 
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