Update mkdocs.yml

.github/workflows/mkdocs.yml

@@ -2,17 +2,18 @@ name: Publish docs via GitHub Pages
 on:
   push:
     branches:
-      - main
-      - dev
+      - "master"
+      - "dev"
 
 jobs:
   build:
     name: Deploy docs
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout dev
-        uses: actions/checkout@v2
-
+      - name: Checkout master
+        uses: actions/checkout@v4
+        with:
+          ref: master
       - name: Deploy docs
         uses: mhausenblas/mkdocs-deploy-gh-pages@master
         # Or use mhausenblas/mkdocs-deploy-gh-pages@nomaterial to build without the mkdocs-material theme