chore(deps): update bazel-contrib/.github action to v6 (#45)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [bazel-contrib/.github](https://togithub.com/bazel-contrib/.github) |
action | major | `v5` -> `v6` |

---

### Release Notes

<details>
<summary>bazel-contrib/.github (bazel-contrib/.github)</summary>

### [`v6`](https://togithub.com/bazel-contrib/.github/compare/v5...v6)

[Compare
Source](https://togithub.com/bazel-contrib/.github/compare/v5...v6)

</details>

---

### Configuration

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Automerge - At any time (no schedule defined).

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

♻ **Rebasing**: Whenever PR becomes conflicted, 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

---

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.github/workflows/ci.yaml

diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index dfeae7a..9eda7bf 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -17,11 +17,11 @@
 
 jobs:
   unit_tests:
-    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v5
+    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v6
     with:
       folders: '["."]'
   bcr_test:
-    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v5
+    uses: bazel-contrib/.github/.github/workflows/bazel.yaml@v6
     with:
       folders: '["test/bcr_test"]'
       exclude: |

.github/workflows/release.yml

diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 490df7e..f8d038a 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@
 
 jobs:
   release:
-    uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v5
+    uses: bazel-contrib/.github/.github/workflows/release_ruleset.yaml@v6
     with:
       release_files: bazel_features-*.tar.gz
       prerelease: false