Update cache-key-prefix to include the runner os

Author: Wissididom

.github/workflows/ci.yml

@@ -21,6 +21,7 @@ jobs:
       uses: jurplel/install-qt-action@v3
       with:
         cache: true
+        cache-key-prefix: install-qt-action-${{runner.os}}
 
     - name: Git Checkout
       uses: actions/checkout@v4
@@ -58,6 +59,7 @@ jobs:
       uses: jurplel/install-qt-action@v3
       with:
         cache: true
+        cache-key-prefix: install-qt-action-${{runner.os}}
 
     - name: Install LCOV
       run: sudo apt install lcov