chore(deps): bump thinca/action-setup-vim from 2 to 3

Bumps [thinca/action-setup-vim](https://github.com/thinca/action-setup-vim) from 2 to 3.
- [Release notes](https://github.com/thinca/action-setup-vim/releases)
- [Changelog](https://github.com/thinca/action-setup-vim/blob/master/CHANGELOG.md)
- [Commits](thinca/action-setup-vim@v2...v3)

---
updated-dependencies:
- dependency-name: thinca/action-setup-vim
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/buildtest.yml

@@ -84,7 +84,7 @@ jobs:
           echo '::endgroup::'
       - name: Setup Vim
         id: 'vim'
-        uses: thinca/action-setup-vim@v2
+        uses: thinca/action-setup-vim@v3
         with:
           vim_version: '${{ matrix.vim }}'
           vim_type: '${{ matrix.type }}'
@@ -221,7 +221,7 @@ jobs:
           echo '::endgroup::'
       - name: Setup Vim
         id: 'vim'
-        uses: thinca/action-setup-vim@v2
+        uses: thinca/action-setup-vim@v3
         with:
           vim_version: '${{ matrix.vim }}'
           vim_type: '${{ matrix.type }}'