CI: Update test-linux to ubuntu-22.04 to avoid Qt6-libssl1.1 incompat…

…ibility

	qt.network.ssl: The backend "cert-only" does not support QSslKey
	qt.network.ssl: Active TLS backend does not support key creation
	qt.network.ssl: The backend named "cert-only" does not support TLS
	qt.network.ssl: QSslSocket::connectToHostEncrypted: TLS initialization failed

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
   test-linux:
     timeout-minutes: 5
     needs: lint
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix: