build(deps): bump envoyproxy/toolshed from actions-v0.2.35 to 0.3.12

Bumps [envoyproxy/toolshed](https://github.com/envoyproxy/toolshed) from actions-v0.2.35 to 0.3.12. This release includes the previously tagged commit.
- [Release notes](https://github.com/envoyproxy/toolshed/releases)
- [Commits](envoyproxy/toolshed@actions-v0.2.35...actions-v0.3.12)

---
updated-dependencies:
- dependency-name: envoyproxy/toolshed
  dependency-type: direct:production
...

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

.github/workflows/_build_image.yml

@@ -43,7 +43,7 @@ jobs:
     runs-on: ${{ inputs.host_platform }}
     name: Build and test Docker image
     steps:
-    - uses: envoyproxy/toolshed/gh-actions/diskspace@actions-v0.2.35
+    - uses: envoyproxy/toolshed/gh-actions/diskspace@actions-v0.3.12
       name: 'Free disk space'
     - name: 'Checkout repository'
       uses: actions/checkout@v4