chore(deps): update actions/setup-go action to v6 (#168)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/setup-go](https://redirect.github.com/actions/setup-go) |
action | major | `v5` -> `v6` |

---

### Release Notes

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

### [`v6`](https://redirect.github.com/actions/setup-go/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/setup-go/compare/v5...v6)

</details>

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.github/actions/set_up_macos/action.yml

@@ -26,6 +26,6 @@ runs:
         repo_name: ${{ inputs.repo_name }}
     # As of macos-13 runner, go was not on the PATH. This resulted in bazel run 
     # //:go_update_repos failing.
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ">=1.20.0"

.github/actions/set_up_ubuntu/action.yml

@@ -20,7 +20,7 @@ runs:
     # not compatible with the version in rules_go 0.43.0. As a workaround, the 
     # following installs the version of Go that is listed in the go.mod file.
     # Related to https://github.com/bazelbuild/bazel-gazelle/issues/1671
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version-file: go.mod
     - uses: cgrindel/gha_install_swift_on_ubuntu@v2