Updates docs.yml workflow to use newer doxygen

Author: louis-langholtz

.github/workflows/docs.yml

@@ -22,8 +22,9 @@ jobs:
 
     - name: Prerequisites
       run: |
-        sudo apt update
-        sudo apt install doxygen graphviz
+        sudo add-apt-repository universe
+        sudo apt-get -y update
+        sudo apt-get -y install doxygen=1.9.8+ds-2 graphviz
 
     - name: Configure
       run: >