build(deps-dev): bump mermaid from 11.14.0 to 11.15.0 in /exampleSite

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:development
...

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

Author: dependabot[bot]

exampleSite/package-lock.json

@@ -48,7 +48,7 @@
     "include-media": "^1.4.10",
     "katex": "^0.16.11",
     "mark.js": "^8.11.1",
-    "mermaid": "^11.14.0",
+    "mermaid": "^11.15.0",
     "plyr": "^3.7.2",
     "popper.js": "^1.16.1",
     "typeit": "^8.8.7"