chore(deps): bump technote-space/get-diff-action from 4 to 6

Bumps [technote-space/get-diff-action](https://github.com/technote-space/get-diff-action) from 4 to 6.
- [Release notes](https://github.com/technote-space/get-diff-action/releases)
- [Changelog](https://github.com/technote-space/get-diff-action/blob/main/.releasegarc)
- [Commits](technote-space/get-diff-action@v4...v6)

---
updated-dependencies:
- dependency-name: technote-space/get-diff-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/lint.yml

@@ -14,7 +14,7 @@ jobs:
     timeout-minutes: 4
     steps:
       - uses: actions/checkout@v2
-      - uses: technote-space/get-diff-action@v4
+      - uses: technote-space/get-diff-action@v6
         with:
           SUFFIX_FILTER: |
             .go