build(deps): bump technote-space/get-diff-action from 4.1.2 to 4.2 (#226)

Bumps [technote-space/get-diff-action](https://github.com/technote-space/get-diff-action) from 4.1.2 to 4.2.
- [Release notes](https://github.com/technote-space/get-diff-action/releases)
- [Changelog](https://github.com/technote-space/get-diff-action/blob/main/.releasegarc)
- [Commits](https://github.com/technote-space/get-diff-action/compare/v4.1.2...v4.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2.3.4
-      - uses: technote-space/get-diff-action@v4.1.2
+      - uses: technote-space/get-diff-action@v4.2
         id: git_diff
         with:
           SUFFIX_FILTER: |