Bump purcell/setup-emacs from 6.0 to 8.0

Bumps [purcell/setup-emacs](https://github.com/purcell/setup-emacs) from 6.0 to 8.0.
- [Release notes](https://github.com/purcell/setup-emacs/releases)
- [Commits](purcell/setup-emacs@v6.0...v8.0)

---
updated-dependencies:
- dependency-name: purcell/setup-emacs
  dependency-version: '8.0'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/emacs-lint.yml

@@ -25,7 +25,7 @@ jobs:
       EMACS_PACKAGE_LINT_IGNORE: ${{ matrix.package_lint_ignore }}
       EMACS_BYTECOMP_WARN_IGNORE: ${{ matrix.bytecomp_warn_ignore }}
     steps:
-    - uses: purcell/setup-emacs@v6.0
+    - uses: purcell/setup-emacs@v8.0
       with:
         version: ${{ matrix.emacs_version }}