Bump github.com/docker/buildx in /tools in the tools group

Bumps the tools group in /tools with 1 update: [github.com/docker/buildx](https://github.com/docker/buildx).


Updates `github.com/docker/buildx` from 0.20.0 to 0.20.1
- [Release notes](https://github.com/docker/buildx/releases)
- [Commits](docker/buildx@v0.20.0...v0.20.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

tools/go.mod

@@ -4,7 +4,7 @@ go 1.22.1
 toolchain go1.23.5
 
 require (
-	github.com/docker/buildx v0.20.0
+	github.com/docker/buildx v0.20.1
 	github.com/golangci/golangci-lint v1.63.4
 	github.com/psampaz/go-mod-outdated v0.9.0
 	helm.sh/helm/v3 v3.17.0

tools/go.sum

@@ -229,8 +229,8 @@ github.com/distribution/reference v0.6.0 h1:0IXCQ5g4/QMHHkarYzh5l+u8T3t73zM5Qvfr
 github.com/distribution/reference v0.6.0/go.mod h1:BbU0aIcezP1/5jX/8MP0YiH4SdvB5Y4f/wlDRiLyi3E=
 github.com/dlclark/regexp2 v1.11.0 h1:G/nrcoOa7ZXlpoa/91N3X7mM3r8eIlMBBJZvsz/mxKI=
 github.com/dlclark/regexp2 v1.11.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
-github.com/docker/buildx v0.20.0 h1:XM2EvwEfohbxLPAheVm03biNHpspB/dA6U9F0c6yJsI=
-github.com/docker/buildx v0.20.0/go.mod h1:VVi4Nvo4jd/IkRvwyExbIyW7u82fivK61MRx5I0oKic=
+github.com/docker/buildx v0.20.1 h1:q88EfoYwrWEKVqNb9stOFq8fUlFp/OPlDcFE+QUYZBM=
+github.com/docker/buildx v0.20.1/go.mod h1:VVi4Nvo4jd/IkRvwyExbIyW7u82fivK61MRx5I0oKic=
 github.com/docker/cli v27.5.0+incompatible h1:aMphQkcGtpHixwwhAXJT1rrK/detk2JIvDaFkLctbGM=
 github.com/docker/cli v27.5.0+incompatible/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
 github.com/docker/cli-docs-tool v0.9.0 h1:CVwQbE+ZziwlPqrJ7LRyUF6GvCA+6gj7MTCsayaK9t0=