misc: Fix jq install for testlib-quick-matrix (#1038)

.github/workflows/ci-tests.yaml

@@ -70,10 +70,10 @@ jobs:
         steps:
             - uses: actions/checkout@v4
 
-      # Unfortunately the 'ubunutu-latest' image doesn't have jq installed.
-      # We therefore need to install it as a step here.
+            # Unfortunately the image doesn't have jq installed.
+            # We therefore need to install it as a step here.
             - name: Install jq
-              run: apt install -y jq
+              run: apt update && apt install -y jq
 
             - name: Get directories for testlib-quick
               working-directory: ${{ github.workspace }}/tests