Bump coursier/cache-action from 7 to 8 (#472)

Bumps [coursier/cache-action](https://github.com/coursier/cache-action) from 7 to 8.
- [Release notes](https://github.com/coursier/cache-action/releases)
- [Commits](coursier/cache-action@v7...v8)

---
updated-dependencies:
- dependency-name: coursier/cache-action
  dependency-version: '8'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - uses: coursier/cache-action@v7
+    - uses: coursier/cache-action@v8
     - uses: coursier/setup-action@v2.0
       with:
         jvm: 21
@@ -39,7 +39,7 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - uses: coursier/cache-action@v7
+    - uses: coursier/cache-action@v8
     - uses: coursier/setup-action@v2.0
       with:
         jvm: 21
@@ -54,7 +54,7 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - uses: coursier/cache-action@v7
+    - uses: coursier/cache-action@v8
     - uses: coursier/setup-action@v2.0
       with:
         jvm: 21