Fix workflow

Author: kostrykin

.github/workflows/pull_upstream.yml

@@ -32,16 +32,33 @@ jobs:
         run: |
           git checkout -b pull_upstream
 
-      - name: Pull from upstream
+      - name: Add remote for upstream
         shell: bash
         run: |
           git remote add upstream https://github.com/kostrykin/python-learning-codespace
           git fetch upstream
+
+      - name: Merge (squash)
+        continue-on-error: true
+        shell: bash
+        run: |
           git merge upstream/master --allow-unrelated-histories --squash
-          git commit --allow-empty -a -m "Update configuration"
+
+      - name: Commit
+        id: commit
+        continue-on-error: true
+        shell: bash
+        run: |
+          git commit -a -m "Update configuration"
+
+      - name: Push
+        if: steps.commit.outcome == 'success'
+        shell: bash
+        run: |
           git push origin pull_upstream
       
       - name: Create pull request
+        if: steps.commit.outcome == 'success'
         shell: bash
         run: |
           gh pr create --fill --head pull_upstream