chore: Sync common workflows

This is an automated sync of common workflows for this organization.
The upstream source is:
shaka-project/shaka-github-tools@69646f3

Author: shaka-bot

.github/workflows/sync-labels.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: shaka-project/shaka-github-tools
 

.github/workflows/update-issues.yaml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           repository: shaka-project/shaka-github-tools