Update sbt/setup-sbt action to v1.1.21 (#5543)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/release.yml

@@ -93,7 +93,7 @@ jobs:
         with:
           java-version: 25
           distribution: temurin
-      - uses: sbt/setup-sbt@dd1ef7d7798fab5ce802a6adab3b782817b8c2d0 # v1.1.20
+      - uses: sbt/setup-sbt@efad9461479a6e19d0b4aa72d2e1188c5fc04e48 # v1.1.21
       - name: Update JUnit dependencies in examples
         run: java src/Updater.java ${RELEASE_VERSION}
         working-directory: junit-examples
@@ -206,7 +206,7 @@ jobs:
         with:
           java-version: 25
           distribution: temurin
-      - uses: sbt/setup-sbt@dd1ef7d7798fab5ce802a6adab3b782817b8c2d0 # v1.1.20
+      - uses: sbt/setup-sbt@efad9461479a6e19d0b4aa72d2e1188c5fc04e48 # v1.1.21
       - name: Update JUnit dependencies in examples
         run: java src/Updater.java ${RELEASE_VERSION}
       - name: Build examples