ci: filter blobs during checkout (#411)

Author: ReenigneArcher

.github/workflows/jekyll-build.yml

@@ -249,6 +249,7 @@ jobs:
           path: gh-pages
           persist-credentials: false  # otherwise, the token used is the GITHUB_TOKEN, instead of the personal token
           fetch-depth: 0  # otherwise, will fail to push refs to dest repo
+          filter: blob:none
 
       # empty contents of gh-pages
       - name: Clean