Bump mermaid from 9.1.1 to 9.1.2 (go-gitea#20256)

Bumps [mermaid](https://github.com/knsv/mermaid) from 9.1.1 to 9.1.2.
- [Release notes](https://github.com/knsv/mermaid/releases)
- [Changelog](https://github.com/mermaid-js/mermaid/blob/develop/CHANGELOG.md)
- [Commits](mermaid-js/mermaid@9.1.1...9.1.2)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Diff for: package-lock.json

@@ -22,7 +22,7 @@
     "less": "4.1.2",
     "less-loader": "11.0.0",
     "license-checker-webpack-plugin": "0.2.1",
-    "mermaid": "9.1.1",
+    "mermaid": "9.1.2",
     "mini-css-extract-plugin": "2.6.0",
     "monaco-editor": "0.33.0",
     "monaco-editor-webpack-plugin": "7.0.1",