ci: Change paths-filter's base to v2 branch (#1043)

Currently it compares it to the default branch (v1) which makes it always run all plugin checks. While i plan to change default branches soon i still need a bit more time for this.

.github/workflows/test-rust.yml

@@ -42,6 +42,7 @@ jobs:
       - uses: dorny/paths-filter@v2
         id: filter
         with:
+          base: v2
           filters: |
             tauri-plugin-authenticator:
               - .github/workflows/test-rust.yml