Alpha builds workflow: wording

Author: Michael Klishin

.github/workflows/alpha-build.yaml

@@ -15,9 +15,9 @@ jobs:
     steps:
       - name: Compute prerelease identifier from commit SHA
         run: echo "PRERELEASE_IDENTIFIER=`echo ${{ github.sha }} | cut -c1-8`" >> $GITHUB_ENV
-      - name: Compute event date and time
+      - name: Compute human-readable release timestamp
         run: echo "PRERELEASE_TIMESTAMP=`date --rfc-3339=seconds`" >> $GITHUB_ENV
-      - name: Compute event UNIX timestamp
+      - name: Compute UNIX release timestamp
         run: echo "PRERELEASE_UNIX_TIMESTAMP=`date +%s`" >> $GITHUB_ENV
       - name: Trigger an alpha build in ${{ env.DEV_WORKFLOW_REPOSITORY }}
         run: |