Bump mkdocs date and Scala versions

Author: MateuszKubuszok

docs/mkdocs.yml

@@ -76,7 +76,7 @@ plugins:
   - search
 copyright: |
   <div style="color: var(--md-footer-fg-color--lighter)">
-  Copyright © 2017—2025, <a href="https://scalaland.io" target="_blank" rel="noopener">Scalaland.io</a>.<br />
+  Copyright © 2017—2026, <a href="https://scalaland.io" target="_blank" rel="noopener">Scalaland.io</a>.<br />
   Chimney is FOSS licensed under Apache 2.0<br />
   <br />
   Documentation made with <a href="https://www.mkdocs.org" target="_blank" rel="noopener">MkDocs</a>, <a href="https://squidfunk.github.io/mkdocs-material/" target="_blank" rel="noopener">Material for MkDocs</a> and <a href="https://mkdocs-macros-plugin.readthedocs.io/" target="_blank" rel="noopener">Mkdocs-Macros</a>, hosted on <a href="https://readthedocs.org/" target="_blank" rel="noopener">Read the Docs</a>
@@ -91,8 +91,8 @@ extra:
     - icon: fontawesome/brands/twitter
       link: https://twitter.com/@scalaland
   scala:
-    2_12: "2.12.20"
-    2_13: "2.13.17"
+    2_12: "2.12.21"
+    2_13: "2.13.18"
     3:    "3.3.7"
   libraries:
     cats:             "2.13.0"