database: update workflows for testing

Author: Morg42

.github/workflows/unittests.yml

@@ -24,6 +24,7 @@ jobs:
           sudo apt-get install librrd-dev libpython3-dev
           sudo apt-get install gcc --only-upgrade
           sudo apt-get install libglib2.0
+          sudo apt-get install libxml2-dev libxslt1-dev
 
       # For push events github.ref_name is the branch name.
       # For PR events github.head_ref is the source branch name.