chore(deps): bump mermaid from 11.12.3 to 11.15.0 (#153)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "astro-og-canvas": "^0.5.4",
     "date-fns": "^4.1.0",
     "date-fns-tz": "^3.2.0",
-    "mermaid": "^11.4.1",
+    "mermaid": "^11.15.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "rehype-slug-custom-id": "^2.0.0",