chore: Update Shopware 6.4.20 to v6.4.20.2

Author: aragon999

.github/workflows/build-docker-images.yaml

@@ -195,7 +195,7 @@ jobs:
             php-version: "8.1"
             flavour: alpine
             template: https://github.com/shopware/production
-          - shopware-version: v6.4.20.0
+          - shopware-version: v6.4.20.2
             php-version: "8.1"
             flavour: alpine
             template: https://github.com/shopware/production
@@ -319,7 +319,7 @@ jobs:
             php-version: "8.1"
             flavour: bullseye
             template: https://github.com/shopware/production
-          - shopware-version: v6.4.20.0
+          - shopware-version: v6.4.20.2
             php-version: "8.1"
             flavour: bullseye
             template: https://github.com/shopware/production