ci: avoid using the deprecated set-env construct

dscho · gitster · commit cac42e471afa · 2020-11-06T22:06:13.000-08:00
The `set-env` construct was deprecated as of the announcement in https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/ Let's use the recommended alternative instead. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/.github/workflows/check-whitespace.yml b/.github/workflows/check-whitespace.yml
@@ -14,7 +14,7 @@ jobs:
     steps:
     - name: Set commit count
       shell: bash
-      run: echo "::set-env name=COMMIT_DEPTH::$((1+$COMMITS))"
+      run: echo "COMMIT_DEPTH=$((1+$COMMITS))" >>$GITHUB_ENV
       env:
         COMMITS: ${{ github.event.pull_request.commits }}
 
