Bump hpi-swa/setup-smalltalkCI (#635)

Bumps [hpi-swa/setup-smalltalkCI](https://github.com/hpi-swa/setup-smalltalkci) from 8f8eaa9239e82639e31d0495f3f51b14ac622ad0 to 521a156968112c9c7ca094ef78c1287a26665f08.
- [Release notes](https://github.com/hpi-swa/setup-smalltalkci/releases)
- [Commits](hpi-swa/setup-smalltalkCI@8f8eaa9...521a156)

---
updated-dependencies:
- dependency-name: hpi-swa/setup-smalltalkCI
  dependency-type: direct:production
...

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

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     name: ${{ matrix.smalltalk }}
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29
-      - uses: hpi-swa/setup-smalltalkCI@8f8eaa9239e82639e31d0495f3f51b14ac622ad0
+      - uses: hpi-swa/setup-smalltalkCI@521a156968112c9c7ca094ef78c1287a26665f08
         with:
           smalltalk-image: ${{ matrix.smalltalk }}
       - run: smalltalkci -s ${{ matrix.smalltalk }}