build: Updates is-compatible check to main

Author: NeedleInAJayStack

.github/workflows/is-compatible.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Build plugin
         run: npm run build
       - name: Compatibility check
-        uses: grafana/plugin-actions/is-compatible@v1
+        uses: grafana/plugin-actions/is-compatible@main
         with:
           module: './src/module.ts'
           comment-pr: 'yes'