build(deps): bump github.com/docker/buildx from 0.19.2 to 0.19.3

Bumps [github.com/docker/buildx](https://github.com/docker/buildx) from 0.19.2 to 0.19.3.
- [Release notes](https://github.com/docker/buildx/releases)
- [Commits](docker/buildx@v0.19.2...v0.19.3)

---
updated-dependencies:
- dependency-name: github.com/docker/buildx
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/containerd/platforms v0.2.1
 	github.com/davecgh/go-spew v1.1.1
 	github.com/distribution/reference v0.6.0
-	github.com/docker/buildx v0.19.2
+	github.com/docker/buildx v0.19.3
 	github.com/docker/cli v27.4.0+incompatible
 	github.com/docker/cli-docs-tool v0.8.0
 	github.com/docker/docker v27.4.0+incompatible

go.sum

@@ -122,8 +122,8 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/denisenkom/go-mssqldb v0.0.0-20191128021309-1d7a30a10f73/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
 github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5QvfrDyIgxBk=
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
-github.com/docker/buildx v0.19.2 h1:2zXzgP2liQKgQ5BiOqMc+wz7hfWgAIMWw5MR6QDG++I=
-github.com/docker/buildx v0.19.2/go.mod h1:k4WP+XmGRYL0a7l4RZAI2TqpwhuAuSQ5U/rosRgFmAA=
+github.com/docker/buildx v0.19.3 h1:FL8ilSQi5HXzvEXHzLXW9oBuz8XzOsO/t2JVPTwo+Gs=
+github.com/docker/buildx v0.19.3/go.mod h1:k4WP+XmGRYL0a7l4RZAI2TqpwhuAuSQ5U/rosRgFmAA=
 github.com/docker/cli v27.4.0+incompatible h1:/nJzWkcI1MDMN+U+px/YXnQWJqnu4J+QKGTfD6ptiTc=
 github.com/docker/cli v27.4.0+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/cli-docs-tool v0.8.0 h1:YcDWl7rQJC3lJ7WVZRwSs3bc9nka97QLWfyJQli8yJU=