Build(ci): Bump CodSpeedHQ/action from 3 to 4

Bumps [CodSpeedHQ/action](https://github.com/codspeedhq/action) from 3 to 4.
- [Release notes](https://github.com/codspeedhq/action/releases)
- [Changelog](https://github.com/CodSpeedHQ/action/blob/main/CHANGELOG.md)
- [Commits](CodSpeedHQ/action@v3...v4)

---
updated-dependencies:
- dependency-name: CodSpeedHQ/action
  dependency-version: '4'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/codspeed.yml

@@ -28,7 +28,7 @@ jobs:
         run: cargo codspeed build -p sourmash
 
       - name: Run the benchmarks
-        uses: CodSpeedHQ/action@v3
+        uses: CodSpeedHQ/action@v4
         with:
           run: "cd src/core && cargo codspeed run"
           token: ${{ secrets.CODSPEED_TOKEN }}