Update qbs version.

.cirrus.yml

@@ -230,6 +230,8 @@ macos_task_template: &MACOS_TASK_TEMPLATE
     - security find-identity -v -p codesigning
     - brew update > /dev/null
     - brew install qt6 coreutils ccache qbs cmake ninja git openssl@1.1 pkg-config poppler xerces-c
+    - brew outdated
+    - brew upgrade qt6 qbs
     - echo $PATH
     - export PATH="${HOME}/.local/bin:`python3 -m site --user-base`/bin:$PATH"
     - echo $PATH