docs(deps): bump astro-mermaid from 1.1.0 to 1.2.0 in /docs-site

Bumps [astro-mermaid](https://github.com/joesaby/astro-mermaid) from 1.1.0 to 1.2.0.
- [Commits](joesaby/astro-mermaid@v1.1.0...v1.2.0)

---
updated-dependencies:
- dependency-name: astro-mermaid
  dependency-version: 1.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

docs-site/package-lock.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "@astrojs/starlight": "^0.35.2",
     "astro": "^5.15.3",
-    "astro-mermaid": "^1.0.0"
+    "astro-mermaid": "^1.2.0"
   },
   "devDependencies": {
     "@types/node": "^24.9.1",