Bump coursier/cache-action from 6 to 7

Bumps [coursier/cache-action](https://github.com/coursier/cache-action) from 6 to 7.
- [Release notes](https://github.com/coursier/cache-action/releases)
- [Commits](coursier/cache-action@v6...v7)

---
updated-dependencies:
- dependency-name: coursier/cache-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
         java-version: 11
         distribution: temurin
     - uses: actions/checkout@v5
-    - uses: coursier/cache-action@v6
+    - uses: coursier/cache-action@v7
     - uses: sbt/setup-sbt@v1
     - run: sbt -v
            "set Test / g8 / g8Properties ~= { _ + (\"scala_version\" -> \"${{ matrix.scala }}\")}"