chore(deps): update dependency mermaid to v11.15.0 [security] (#120)

Signed-off-by: Jan-Hendrik Spahn <jan-hendrik.spahn@soptim.de>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Jan-Hendrik Spahn <jan-hendrik.spahn@soptim.de>

Author: renovate[bot]

frontend/LICENSES-THIRD-PARTY.md

@@ -167,7 +167,7 @@
 
 ### mermaid
 - **Package:** mermaid
-- **Version:** 11.14.0
+- **Version:** 11.15.0
 - **License:** MIT
 - **URL:** [https://github.com/mermaid-js/mermaid](https://github.com/mermaid-js/mermaid)