build: fix schedule for python req. hygiene github action (#79)

Author: Matt Hughes

.github/workflows/upgrade-python-requirements.yml

@@ -2,8 +2,8 @@ name: Upgrade Requirements
 
 on:
   schedule:
-    # will start the job at 17:15 UTC (roughly) every other Monday
-    - cron: "15 17 8-14,22-28 * 1"
+    # will start the job at 15:15 UTC every other week starting on the 5th of the month
+    - cron: "15 15 5/14 * *"
   workflow_dispatch:
     inputs:
       branch:
@@ -65,7 +65,7 @@ jobs:
           subject: Upgrade python requirements workflow failed in ${{github.repository}}
           to: [email protected]
           from: github-actions <[email protected]>
-          body: Upgrade python requirements workflow in ${{github.repository}} failed! For details see "github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+          body: Upgrade python requirements workflow executed in ${{github.repository}}. For details see "github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}". Run failed.
 
       - name: Send success notification
         uses: dawidd6/action-send-mail@v3
@@ -77,4 +77,4 @@ jobs:
           subject: Upgrade python requirements workflow executed successfully in ${{github.repository}}
           to: [email protected]
           from: github-actions <[email protected]>
-          body: Upgrade python requirements workflow in ${{github.repository}} successfully created 'Python Requirements Update' PR. Please review it "github.com/${{ github.repository }}/pulls"
+          body: Upgrade python requirements workflow executed in {{github.repository}}. For details see "github.com/${{ github.repository }}/pulls"