Update render-all.yml with a force push of docs (#777)

.github/workflows/render-all.yml

@@ -102,7 +102,7 @@ jobs:
           git add --force docs/*
           git commit -m 'Render course' || echo "No changes to commit"
           git status docs/*
-          git push -u origin main  || echo "No changes to push"
+          git push --force -u origin main  || echo "No changes to push"
 
   render-tocless:
     name: Render TOC-less version for Leanpub or Coursera
@@ -150,7 +150,7 @@ jobs:
           git add --force docs/no_toc*
           git commit -m 'Render toc-less' || echo "No changes to commit"
           git status docs/no_toc*
-          git push -u origin main  || echo "No changes to push"
+          git push --force -u origin main  || echo "No changes to push"
 
   render-leanpub:
     name: Finish Leanpub prep
@@ -277,4 +277,4 @@ jobs:
           git add --force docs/*
           git commit -m 'Render Coursera quizzes' || echo "No changes to commit"
           git status
-          git push -u origin main  || echo "No changes to push"
+          git push --force -u origin main  || echo "No changes to push"