Perform apt update to sync repo sources before trying to install from them

Author: NlightNFotis

.github/workflows/publish.yaml

@@ -12,7 +12,9 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install doxygen
-        run: sudo apt install doxygen graphviz pandoc npm
+        run: |
+          sudo apt update
+          sudo apt install doxygen graphviz pandoc npm
 
       - name: Install python modules
         run: sudo python3 -m pip install gitpython pandocfilters