install qhelpgenerator

.github/workflows/root-docs.yml

@@ -100,13 +100,18 @@ jobs:
       # code of the `if`.
       run: 'if [ -d /py-venv/ROOT-CI/bin/ ]; then . /py-venv/ROOT-CI/bin/activate && echo PATH=$PATH >> $GITHUB_ENV; fi'
 
-    # TODO: install latest version in image on root-ci-images
-    # TODO: install qhelpgenerator
+    # TODO: install latest versions in image on root-ci-images
     - name: Install Doxygen 1.10.0
       run : |
         mkdir -p ${{ github.workspace }}/doxygen
         curl -L https://github.com/doxygen/doxygen/releases/download/Release_1_10_0/doxygen-1.10.0.linux.bin.tar.gz | tar -xz -C ${{ github.workspace }}/doxygen/ --strip-components=1
         echo PATH=$PATH:${{ github.workspace }}/doxygen/bin >> $GITHUB_ENV
+    - name: Install qhelpgenerator
+      run : |
+        dnf update -y && dnf install -y sudo
+        sudo dnf update -y
+        sudo dnf upgrade -y
+        sudo dnf install -y qt5-qhelpgenerator
 
     - name: Apply option overrides
       if: ${{ github.event_name != 'schedule' }}