Update Playwright failure message for clarity

Author: ethangardner

.github/workflows/playwright.yml

@@ -42,6 +42,6 @@ jobs:
         if: ${{ failure() }}
         with:
           message: |
-            ### Playwright visual snapshot differences were detected.
-            View the [Playwright report](${{ steps.artifact-upload.outputs.artifact-url }}) to review the visual differences.
-            **To approve the snapshot changes and update the snapshots, please comment:** /approve-snapshots
+            ### Playwright tests failed.
+            View the [Playwright report](${{ steps.artifact-upload.outputs.artifact-url }}) to review any visual differences.
+            **To generate updated snapshots, please comment:** /approve-snapshots