ci: use matrix to allow multiple fork owners in sync-fork action

towards CCBR/kelly_log#16

.github/workflows/sync-fork.yml

@@ -13,19 +13,20 @@ permissions:
 
 env:
   GH_TOKEN: ${{ github.token }}
-  FORK_OWNER: NCIPangea
   UPSTREAM_OWNER: CCBR
 
 jobs:
   sync:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        FORK_OWNER: [NCIPangea]
     steps:
-      - name: get repo name
-        # required for actions scheduled via cron, as github.event.repository.name won't work
-        run: |
-            echo "REPO=$(basename ${{ github.repository }})" >> $GITHUB_ENV
       - name: sync fork
         # only run this action from the forked repo
-        if: ${{ github.repository_owner == env.FORK_OWNER }}
+        if: ${{ github.repository_owner == matrix.FORK_OWNER }}
         run: |
+          # required for actions scheduled via cron, as github.event.repository.name won't work
+          echo "REPO=$(basename ${{ github.repository }})" >> $GITHUB_ENV
+          # sync the fork from upstream
           gh repo sync ${{ github.repository }} --source $UPSTREAM_OWNER/$REPO --force