Bump coursier/cache-action from 6.3 to 6.4 (#9)

Bumps [coursier/cache-action](https://github.com/coursier/cache-action) from 6.3 to 6.4.
- [Release notes](https://github.com/coursier/cache-action/releases)
- [Commits](coursier/cache-action@v6.3...v6.4)

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

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

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

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - uses: coursier/cache-action@v6.3
+    - uses: coursier/cache-action@v6.4
     - uses: coursier/setup-action@v1.2.1
       with:
         jvm: 8
@@ -32,7 +32,7 @@ jobs:
       with:
         fetch-depth: 0
         submodules: true
-    - uses: coursier/cache-action@v6.3
+    - uses: coursier/cache-action@v6.4
     - uses: coursier/setup-action@v1.2.1
       with:
         jvm: 8