workflows: switch small jobs to ubuntu-slim

Save some resources.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>

Author: bgilbert

.github/workflows/java.yaml

@@ -13,7 +13,7 @@ permissions:
 jobs:
   pre-commit:
     name: Rerun pre-commit checks
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     steps:
       - name: Check out repo
         uses: actions/checkout@v5
@@ -22,7 +22,7 @@ jobs:
         with:
           python-version: 3.14
       - name: Install dependencies
-        run: python -m pip install pre-commit
+        run: python -m pip install pre-commit PyYAML
       - name: Cache pre-commit environments
         uses: actions/cache@v4
         with:
@@ -112,7 +112,7 @@ jobs:
     name: Release
     if: github.ref_type == 'tag'
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     concurrency: release-${{ github.ref }}
     permissions:
       contents: write