Fix syntax error in 'wheels.yml' (#131)

Add notify-wheel-failure.yml to notify us when "Build Wheels" workflow fails execution.

Co-authored-by: Simon Beal <[email protected]>
Co-authored-by: Diana Nanuti <[email protected]>

Author: muddyfish

.github/workflows/notify-wheel-failure.yml

@@ -0,0 +1,26 @@
+name: Workflow Failure Slack Notifier
+
+on:
+  workflow_run:
+    workflows:
+      - Build Wheels
+    types: [completed]
+
+jobs:
+  on-failure:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
+    steps:
+      - name: Send notification to Slack
+        uses: slackapi/[email protected]
+        with:
+          payload: |
+            {
+              "action": "${{ github.event.action }}",
+              "conclusion": "${{ github.event.workflow_run.conclusion }}",
+              "workflow_name": "${{ github.event.workflow.name }}",
+              "workflow_run_url": "${{ github.event.workflow_run.html_url }}"
+            }
+        env:
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_WORKFLOW_FAILURE }}
+          SLACK_WEBHOOK_TYPE: INCOMING_WEBHOOK

.github/workflows/wheels.yml

@@ -58,7 +58,7 @@ jobs:
       # https://github.com/actions/upload-artifact/issues/478
       - uses: actions/download-artifact@v3
         with:
-          name: ${{ ARTIFACT_NAME }}
+          name: ${{ env.ARTIFACT_NAME }}
 
       - name: Rename third party license
         run: |
@@ -91,7 +91,7 @@ jobs:
 
       - uses: actions/download-artifact@v3
         with:
-          name: ${{ ARTIFACT_NAME }}
+          name: ${{ env.ARTIFACT_NAME }}
 
       - name: Copy license files
         run: |