Bump mermaid from 11.12.2 to 11.15.0

Bumps [mermaid](https://github.com/mermaid-js/mermaid) from 11.12.2 to 11.15.0.
- [Release notes](https://github.com/mermaid-js/mermaid/releases)
- [Commits](https://github.com/mermaid-js/mermaid/compare/mermaid@11.12.2...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

@@ -22,7 +22,7 @@
 	"dependencies": {
 		"@sveltejs/adapter-static": "^3.0.10",
 		"better-sqlite3": "^12.6.2",
-		"mermaid": "^11.12.2",
+		"mermaid": "^11.15.0",
 		"puppeteer": "^24.34.0",
 		"qrcode": "^1.5.4",
 		"tippy.js": "^6.3.7",