move single-commit to tagged releases

Author: jacobwilliams

.github/workflows/CI.yml

@@ -150,7 +150,6 @@ jobs:
       with:
         branch: gh-pages # The branch the action should deploy to.
         folder: doc  # The folder the action should deploy.
-        single-commit: true
         clean: true
         clean-exclude: |
           prev
@@ -172,6 +171,7 @@ jobs:
         branch: gh-pages # The branch the action should deploy to.
         folder: doc  # The folder the action should deploy.
         target-folder: prev/${{github.ref_name}} # deploy to a version-specific folder
+        single-commit: true
 
     - name: Upload coverage
       if: matrix.gcc_v == 7