Bump coursier/cache-action from 6.4.7 to 6.4.8

Bumps [coursier/cache-action](https://github.com/coursier/cache-action) from 6.4.7 to 6.4.8.
- [Release notes](https://github.com/coursier/cache-action/releases)
- [Commits](coursier/cache-action@4e26158...bebeeb0)

---
updated-dependencies:
- dependency-name: coursier/cache-action
  dependency-version: 6.4.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -15,5 +15,5 @@ jobs:
         java-version: 8
         distribution: temurin
     - uses: sbt/setup-sbt@v1
-    - uses: coursier/cache-action@4e2615869d13561d626ed48655e1a39e5b192b3c # v6.4.7
+    - uses: coursier/cache-action@bebeeb0e6f48ebad66d3783946588ecf43114433 # v6.4.8
     - run: sbt -v "+ Test/compile"