Fix renovatebot link (#499)

This now redirects. There was a choice of https://docs.renovatebot.com/
or https://www.mend.io/renovate/ to replace it with, and I think the
docs site makes more sense (mend.io is more of a sales site).

Author: dstansby

.all-contributorsrc

@@ -112,7 +112,7 @@
       "login": "renovatebot",
       "name": "Renovate Bot",
       "avatar_url": "https://avatars.githubusercontent.com/u/38656520?v=4",
-      "profile": "https://renovatebot.com",
+      "profile": "https://docs.renovatebot.com/",
       "contributions": [
         "maintenance"
       ]

README.md

@@ -90,7 +90,7 @@ uv pip install -e ".[dev]"
       <td align="center" valign="top" width="14.28%"><a href="http://matt-graham.github.io"><img src="https://avatars.githubusercontent.com/u/6746980?v=4?s=100" width="100px;" alt="Matt Graham"/><br /><sub><b>Matt Graham</b></sub></a><br /><a href="#bug-matt-graham" title="Bug reports">🐛</a> <a href="#code-matt-graham" title="Code">💻</a> <a href="#content-matt-graham" title="Content">🖋</a> <a href="#doc-matt-graham" title="Documentation">📖</a> <a href="#design-matt-graham" title="Design">🎨</a> <a href="#eventOrganizing-matt-graham" title="Event Organizing">📋</a> <a href="#review-matt-graham" title="Reviewed Pull Requests">👀</a> <a href="#talk-matt-graham" title="Talks">📢</a> <a href="#test-matt-graham" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/sfmig"><img src="https://avatars.githubusercontent.com/u/33267254?v=4?s=100" width="100px;" alt="sfmig"/><br /><sub><b>sfmig</b></sub></a><br /><a href="#bug-sfmig" title="Bug reports">🐛</a> <a href="#code-sfmig" title="Code">💻</a> <a href="#content-sfmig" title="Content">🖋</a> <a href="#review-sfmig" title="Reviewed Pull Requests">👀</a> <a href="#test-sfmig" title="Tests">⚠️</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/p-j-smith"><img src="https://avatars.githubusercontent.com/u/29753790?v=4?s=100" width="100px;" alt="Paul Smith"/><br /><sub><b>Paul Smith</b></sub></a><br /><a href="#bug-p-j-smith" title="Bug reports">🐛</a> <a href="#code-p-j-smith" title="Code">💻</a> <a href="#content-p-j-smith" title="Content">🖋</a> <a href="#doc-p-j-smith" title="Documentation">📖</a> <a href="#question-p-j-smith" title="Answering Questions">💬</a> <a href="#review-p-j-smith" title="Reviewed Pull Requests">👀</a> <a href="#test-p-j-smith" title="Tests">⚠️</a></td>
-      <td align="center" valign="top" width="14.28%"><a href="https://renovatebot.com"><img src="https://avatars.githubusercontent.com/u/38656520?v=4?s=100" width="100px;" alt="Renovate Bot"/><br /><sub><b>Renovate Bot</b></sub></a><br /><a href="#maintenance-renovatebot" title="Maintenance">🚧</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="https://docs.renovatebot.com/"><img src="https://avatars.githubusercontent.com/u/38656520?v=4?s=100" width="100px;" alt="Renovate Bot"/><br /><sub><b>Renovate Bot</b></sub></a><br /><a href="#maintenance-renovatebot" title="Maintenance">🚧</a></td>
     </tr>
     <tr>
       <td align="center" valign="top" width="14.28%"><a href="https://github.com/ruaridhg"><img src="https://avatars.githubusercontent.com/u/32329546?v=4?s=100" width="100px;" alt="ruaridhg"/><br /><sub><b>ruaridhg</b></sub></a><br /><a href="#bug-ruaridhg" title="Bug reports">🐛</a> <a href="#code-ruaridhg" title="Code">💻</a> <a href="#content-ruaridhg" title="Content">🖋</a> <a href="#review-ruaridhg" title="Reviewed Pull Requests">👀</a></td>