build: update buildx to latest

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

Author: crazy-max

.github/workflows/build.yml

@@ -206,8 +206,7 @@ jobs:
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
         with:
-          # TODO: switch to latest once Buildx v0.30.0 is released
-          version: v0.30.0-rc2
+          version: latest
           buildkitd-flags: --debug
       -
         name: Login to registry