chore(dependabot): hold back vue-router 5 as well

vue-router 5 peers `vite: ^7.3.0 || ^8.0.0` and expects a Vite toolchain. These
apps build with webpack, which cannot resolve it at all: the build dies on
`Can't resolve 'vue-router'` from src and from @nextcloud/vue's own chunks.
Adopting it is a Vite migration, not a version bump.

Dependabot proposed it across 8 repositories in a single run, and merging any
one of them takes that app's build from green to red with no code change that
can fix it.

versioniq already builds with Vite and is the natural pilot if the fleet does
move. Lift this when an app's toolchain can actually take it.

Author: rubenvdlinde

.github/dependabot.yml

@@ -26,6 +26,13 @@ updates:
     ignore:
       - dependency-name: "typescript"
         update-types: ["version-update:semver-major"]
+      # vue-router 5 peers `vite: ^7.3.0 || ^8.0.0` and expects a Vite
+      # toolchain. These apps build with webpack, which cannot resolve it at
+      # all: the build dies on `Can't resolve 'vue-router'`. Adopting it is a
+      # Vite migration, not a bump. versioniq is already on Vite and is the
+      # natural pilot.
+      - dependency-name: "vue-router"
+        update-types: ["version-update:semver-major"]
       - dependency-name: "webpack-cli"
         update-types: ["version-update:semver-major"]
       - dependency-name: "@babel/core"