Update main.yml

- Update Flutter Action v2.3.0.
- Create date and seconds steps.

Author: rayliverified

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
         with:
           submodules: recursive
           token: ${{ secrets.PAT }}
-      - uses: subosito/flutter-action@v1.5.3
+      - uses: subosito/flutter-action@v2.3.0
         with:
           channel: stable
       - name: Clone deployment repo
@@ -24,6 +24,12 @@ jobs:
         run: |
           flutter build web --release
           mv build/web/* clone_dir/flutterwebsites/minimal
+      - name: Get current date
+        id: date
+        run: echo "::set-output name=date::$(date +'%Y%m%d')"
+      - name: Get time in seconds
+        id: seconds
+        run: echo "::set-output name=seconds::$(seconds +'%s')"
       - name: Push build commit
         run: |
           cd clone_dir