CI: split Debian package installation

.github/workflows/ci-debian.yml

@@ -40,7 +40,6 @@ jobs:
             libkf5parts-dev \
             libkf5service-dev \
             libkf5solid-dev \
-            libkpmcore-dev \
             libparted-dev \
             libpolkit-qt5-1-dev \
             libqt5svg5-dev \
@@ -53,6 +52,7 @@ jobs:
             qtdeclarative5-dev \
             qttools5-dev \
             qttools5-dev-tools
+          apt-get -y install libkpmcore-dev
       - name: "prepare source"
         uses: actions/checkout@v2
       - name: "prepare build"