chore: Sync common workflows (#32)

This is an automated sync of common workflows for this organization.
The upstream source is:
shaka-project/shaka-github-tools@b39597e

Co-authored-by: Shaka Bot <shaka-bot@users.noreply.github.com>

.github/workflows/sync-labels.yaml

@@ -20,7 +20,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
         with:
-          repository: joeyparrish/shaka-github-tools
+          repository: shaka-project/shaka-github-tools
 
       # TODO: revert to micnncim and new release after landing
       #       https://github.com/micnncim/action-label-syncer/pull/68

.github/workflows/update-issues.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
         with:
-          repository: joeyparrish/shaka-github-tools
+          repository: shaka-project/shaka-github-tools
 
       - name: Update Issues
         env: