Bump helm/chart-testing-action from 2.6.1 to 2.7.0

Signed-off-by: RainbowMango <qdurenhongcai@gmail.com>

.github/workflows/installation-chart.yaml

@@ -84,7 +84,7 @@ jobs:
           check-latest: true
 
       - name: Set up chart-testing
-        uses: helm/chart-testing-action@v2.6.1
+        uses: helm/chart-testing-action@v2.7.0
 
       - name: Add dependency chart repos
         run: |
@@ -93,14 +93,14 @@ jobs:
       - name: Run chart-testing (list-changed)
         id: list-changed
         run: |
-          changed=$( ct list-changed )
+          changed=$( ct list-changed --target-branch ${{ github.event.repository.default_branch }})
           if [[ -n "$changed" ]]; then
             echo "changed=true" >> $GITHUB_OUTPUT
           fi
 
       - name: Run chart-testing (lint)
         if: steps.list-changed.outputs.changed == 'true'
-        run: ct lint --debug --check-version-increment=false
+        run: ct lint --debug --check-version-increment=false --target-branch ${{ github.event.repository.default_branch }}
 
       - name: Run chart-testing (install)
         run: |
@@ -108,5 +108,5 @@ jobs:
           hack/setup-dev-base.sh
           export KUBECONFIG=~/.kube/karmada.config
           
-          ct install --charts charts/karmada --debug --helm-extra-set-args '--set components={search,metricsAdapter,descheduler},apiServer.hostNetwork=true' --helm-extra-args "--timeout 800s" --skip-clean-up
+          ct install --target-branch ${{ github.event.repository.default_branch }} --charts charts/karmada --debug --helm-extra-set-args '--set components={search,metricsAdapter,descheduler},apiServer.hostNetwork=true' --helm-extra-args "--timeout 800s" --skip-clean-up
           kubectl get pods -A