Update dependency mermaid to v11.15.0 [SECURITY] (#108)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -19,7 +19,7 @@
     "@types/node": "^25.3.3",
     "globby": "^16.1.0",
     "markdown-it-container": "^4.0.0",
-    "mermaid": "11.14.0",
+    "mermaid": "11.15.0",
     "oxfmt": "0.44.0",
     "oxlint": "1.59.0",
     "remark-frontmatter": "^5.0.0",