CICD: Fix Coverity Scan Workflow.

Change the ordering of steps so that git is installed before the
checkout is performed.

Signed-off-by: Michael Keller <mikeller@042.ch>

.github/workflows/coverity-scan.yml

@@ -11,12 +11,6 @@ jobs:
       image: ubuntu:22.04
 
     steps:
-    - name: checkout sources
-      uses: actions/checkout@v4
-      with:
-        fetch-depth: 0
-        submodules: recursive
-
     - name: add build dependencies
       run: |
         apt-get update
@@ -33,6 +27,12 @@ jobs:
         qtpositioning5-dev qtscript5-dev qttools5-dev qttools5-dev-tools \
         qtquickcontrols2-5-dev libbluetooth-dev libmtp-dev
 
+    - name: checkout sources
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+        submodules: recursive
+
     - name: configure environment
       run: |
         git config --global --add safe.directory $GITHUB_WORKSPACE