ci: decrease number of shards when running Vercel tests

Author: pieh

.github/workflows/test-e2e.yml

@@ -56,12 +56,12 @@ jobs:
         run: |
           if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
             VERSION_SELECTORS=[${{ github.event.inputs.versions }}]
-            echo "group=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]" >> $GITHUB_OUTPUT
-            echo "total=12" >> $GITHUB_OUTPUT
+            echo "group=[1, 2, 3, 4]" >> $GITHUB_OUTPUT
+            echo "total=4" >> $GITHUB_OUTPUT
           elif [ "${{ github.event_name }}" == "pull_request" ]; then
             VERSION_SELECTORS=[\"latest\"]
-            echo "group=[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]" >> $GITHUB_OUTPUT
-            echo "total=12" >> $GITHUB_OUTPUT
+            echo "group=[1, 2, 3, 4]" >> $GITHUB_OUTPUT
+            echo "total=4" >> $GITHUB_OUTPUT
           else
             VERSION_SELECTORS=[\"latest\",\"canary\",\"14.2.15\",\"13.5.1\"]
             echo "group=[1, 2, 3, 4]" >> $GITHUB_OUTPUT