.github: register dependencies in the workflow

Author: khorben

.github/workflows/deforaos-c-ci_ubuntu-latest.yml

@@ -10,9 +10,15 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v4
+    - name: install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y \
+          docbook-xsl \
+          gtk-doc-tools \
+          xsltproc
     - name: bootstrap libSystem
       run: git clone https://github.com/DeforaOS/libSystem.git libSystem && for dir in include data src tools; do (cd libSystem/$dir && make PREFIX="$HOME/opt/DeforaOS" install); done
     - name: make