chore(deps): update actions/setup-go action to v6.3.0 (#15)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-go](https://github.com/actions/setup-go) | action | minor | `v6.2.0` → `v6.3.0` |

---

### Release Notes

<details>
<summary>actions/setup-go (actions/setup-go)</summary>

### [`v6.3.0`](https://github.com/actions/setup-go/releases/tag/v6.3.0)

[Compare Source](https://github.com/actions/setup-go/compare/v6.2.0...v6.3.0)

#### What's Changed

- Update default Go module caching to use go.mod by [@&#8203;priyagupta108](https://github.com/priyagupta108) in [#&#8203;705](https://github.com/actions/setup-go/pull/705)
- Fix golang download url to go.dev by [@&#8203;178inaba](https://github.com/178inaba) in [#&#8203;469](https://github.com/actions/setup-go/pull/469)

**Full Changelog**: <https://github.com/actions/setup-go/compare/v6...v6.3.0>

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #15
Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk>
Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

.gitea/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       #     no-fail: true
 
       - name: Setup Go
-        uses: actions/setup-go@v6.2.0
+        uses: actions/setup-go@v6.3.0
         with:
           go-version: "1.26"
 

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.25-alpine as build
+FROM golang:1.26-alpine as build
 WORKDIR /go/src/app
 COPY . /go/src/app
 RUN CGO_ENABLED=0 go build -o /go/bin/app