Bump mermaid from 11.14.0 to 11.15.0

Bumps [mermaid](https://github.com/mermaid-js/mermaid) from 11.14.0 to 11.15.0.
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](https://github.com/mermaid-js/mermaid/compare/mermaid@11.14.0...mermaid@11.15.0)

---
updated-dependencies:
- dependency-name: mermaid
  dependency-version: 11.15.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

package-lock.json

@@ -181,7 +181,7 @@
     "lit": "3.3.2",
     "markdownlint-cli2": "0.22.1",
     "md-attr-parser": "1.3.0",
-    "mermaid": "11.14.0",
+    "mermaid": "11.15.0",
     "mjml": "5.1.0",
     "nanostores": "1.3.0",
     "node-html-parser": "7.1.0",