fix(deps): update dependency backstage-plugin-techdocs-addon-mermaid to ^0.21.0

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

Author: renovate[bot]

packages/app-migrated/package.json

@@ -42,7 +42,7 @@
     "@backstage/theme": "backstage:^",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
-    "backstage-plugin-techdocs-addon-mermaid": "^0.20.0",
+    "backstage-plugin-techdocs-addon-mermaid": "^0.21.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-router": "^6.3.0",

packages/app/package.json

@@ -40,7 +40,7 @@
     "@backstage/theme": "backstage:^",
     "@material-ui/core": "^4.11.0",
     "@material-ui/icons": "^4.9.1",
-    "backstage-plugin-techdocs-addon-mermaid": "^0.20.0",
+    "backstage-plugin-techdocs-addon-mermaid": "^0.21.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
     "react-router": "^6.3.0",