CI: fix matplot warning about some missing font

Author: AlyaGomaa

.github/workflows/install-slips-dependencies.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Install APT dependencies
       run: |
         sudo apt-get update --fix-missing && sudo apt-get -y --no-install-recommends install $(cat install/apt_dependencies.txt)
-        sudo apt get -y install font-manager
+        sudo apt-get -y install font-manager
 
     - name: Save APT Cache
       uses: actions/cache@v4