fix(deps): update dependency buildx to v0.22.0

| datasource      | package       | from    | to      |
| --------------- | ------------- | ------- | ------- |
| github-releases | docker/buildx | v0.21.3 | v0.22.0 |

Author: renovate[bot]

linux/Dockerfile

@@ -44,7 +44,7 @@ RUN install-tool flux v2.5.1
 RUN install-tool kubectl v1.32.3
 
 # renovate: datasource=github-releases packageName=docker/buildx
-RUN install-tool buildx v0.21.3
+RUN install-tool buildx v0.22.0
 
 # renovate: datasource=github-releases packageName=kubernetes-sigs/kustomize
 RUN install-tool kustomize 5.6.0