Bump graalvm/setup-graalvm from 1.2.6 to 1.2.8

Bumps [graalvm/setup-graalvm](https://github.com/graalvm/setup-graalvm) from 1.2.6 to 1.2.8.
- [Release notes](https://github.com/graalvm/setup-graalvm/releases)
- [Commits](graalvm/setup-graalvm@v1.2.6...v1.2.8)

---
updated-dependencies:
- dependency-name: graalvm/setup-graalvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/build.yml

@@ -105,7 +105,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: graalvm/[email protected].6
+      - uses: graalvm/[email protected].8
         with:
           java-version: ${{ matrix.java }}
           distribution: 'graalvm-community'