GHA: Frontend dependency security fix

Author: nicholasdalhaug

frontend/pnpm-workspace.yaml

@@ -3,4 +3,7 @@ allowBuilds:
   esbuild: true
 minimumReleaseAge: 7200
 overrides:
+  brace-expansion@<=5.0.7: '>=5.0.8'
   esbuild@>=0.27.3 <0.28.1: '>=0.28.1'
+  postcss@<=8.5.17: '>=8.5.18'
+  react-router@>=7.12.0 <8.3.0: '>=8.3.0'