Bump coursier/cache-action from 6.3 to 6.4

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] <[email protected]>

Author: dependabot[bot]

.github/workflows/main.yaml

@@ -14,7 +14,7 @@ jobs:
       JAVA_OPTS: -Xmx4G
     steps:
       - uses: actions/[email protected]
-      - uses: coursier/cache-action@v6.3
+      - uses: coursier/cache-action@v6.4
       - uses: coursier/[email protected]
         with:
           jvm: adopt:11
@@ -42,7 +42,7 @@ jobs:
       - uses: actions/[email protected]
         with:
           fetch-depth: 0
-      - uses: coursier/cache-action@v6.3
+      - uses: coursier/cache-action@v6.4
       - uses: olafurpg/setup-scala@v13
       - run: sbt ci-release
         env: