docs: Removed documentation for github_repository_tag_protection resource as no longer supported by GitHub (#2826)

Co-authored-by: Nick Floyd <[email protected]>

Author: ViacheslavKudinov

website/docs/r/branch_protection.html.markdown

@@ -391,9 +391,6 @@
             <li>
               <a href="/docs/providers/github/r/repository_ruleset.html">github_repository_ruleset</a>
             </li>
-            <li>
-              <a href="/docs/providers/github/r/repository_tag_protection.html">github_repository_tag_protection</a>
-            </li>
             <li>
               <a href="/docs/providers/github/r/repository_topics.html">github_repository_topics</a>
             </li>