chore(deps): update dependencies (#243)

This PR contains the following updates:

| Package | Type | Update | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|---|---|
| [docker/setup-buildx-action](https://github.com/docker/setup-buildx-action) ([changelog](https://github.com/docker/setup-buildx-action/compare/bb05f3f5519dd87d3ba754cc423b652a5edd6d2c..37fe631027851001ddb9b187196cc803df7f5f0e)) | action | digest | `bb05f3f` → `37fe631` |  |  |
| [go](https://go.dev/) ([source](https://github.com/golang/go)) | toolchain | minor | `1.26.6` → `1.27.0` | ![age](https://developer.mend.io/api/mc/badges/age/golang-version/go/1.27.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/golang-version/go/1.26.6/1.27.0?slim=true) |
| golang.org/x/vuln |  | minor | `v1.6.0` → `v1.7.0` | ![age](https://developer.mend.io/api/mc/badges/age/go/golang.org%2fx%2fvuln/v1.7.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/go/golang.org%2fx%2fvuln/v1.6.0/v1.7.0?slim=true) |

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---------

Co-authored-by: silverwind <me@silverwind.io>
Reviewed-on: https://gitea.com/gitea/gitea-mcp/pulls/243
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>

.gitea/workflows/release-nightly.yml

@@ -22,7 +22,7 @@ jobs:
         uses: docker/setup-qemu-action@96fe6ef7f33517b61c61be40b68a1882f3264fb8 # v4
 
       - name: Set up Docker BuildX
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
 
       - name: Login to DockerHub
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4

.gitea/workflows/release-tag.yml

@@ -66,7 +66,7 @@ jobs:
         uses: docker/setup-qemu-action@96fe6ef7f33517b61c61be40b68a1882f3264fb8 # v4
 
       - name: Set up Docker BuildX
-        uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4
+        uses: docker/setup-buildx-action@37fe631027851001ddb9b187196cc803df7f5f0e # v4
 
       - name: Login to DockerHub
         uses: docker/login-action@dbcb813823bdd20940b903addbd779551569679f # v4