Update notify_weekly.yaml

.github/workflows/notify_weekly.yaml

@@ -9,20 +9,21 @@ on:
 jobs:
   send-mattermost-message:
     runs-on: ubuntu-latest
+    env:
+        DATE: $(date  --date="7 days ago" +"%Y-%m-%d")
+        MERGED_URL: "https://github.com/pulls?q=merged%3A%3E${DATE}+org%3Acertbot+"
+        UPDATED_URL: "https://github.com/pulls?q=updated%3A%3E${DATE}+org%3Acertbot+"
     steps:
       - uses: mattermost/action-mattermost-notify@master
         with:
           MATTERMOST_WEBHOOK_URL: ${{ secrets.MATTERMOST_WEBHOOK_URL }}
-          DATE: $(date  --date="7 days ago" +"%Y-%m-%d")
-          MERGED_URL: "https://github.com/pulls?q=merged%3A%3E${DATE}+org%3Acertbot+"
-          UPDATED_URL: "https://github.com/pulls?q=updated%3A%3E${DATE}+org%3Acertbot+"
           PAYLOAD: |-
             {
-              "text": echo "{\"text\":\## Updates Across Certbot Repos\n\n
+              "text": "## Updates Across Certbot Repos\n\n
                 - Certbot team members SHOULD look at: [link]($MERGED_URL)\n\n
                 - Certbot team members MAY also want to look at: [link]($UPDATED_URL)\n\n
                 - Want to Discuss something today? Place it [here](https://docs.google.com/document/d/17YMUbtC1yg6MfiTMwT8zVm9LmO-cuGVBom0qFn8XJBM/edit?usp=sharing) and we can meet today on Zoom.\n\n 
-                - The key words SHOULD and MAY in this message are to be interpreted as described in [RFC 8147](https://www.rfc-editor.org/rfc/rfc8174). \"",
+                - The key words SHOULD and MAY in this message are to be interpreted as described in [RFC 8147](https://www.rfc-editor.org/rfc/rfc8174). \",
               "channel": "private certbot",
               "username": "${{ github.triggering_actor }}",
               "icon": "https://cdn3.iconfinder.com/data/icons/system-basic-vol-4-1/20/icon-note-attention-alt3-512.png"