Switch to ubuntu-slim for small CI jobs (#3446)

Author: jakebailey

.github/workflows/ci.yml

@@ -249,7 +249,7 @@ jobs:
       - run: npx hereby lint
 
   format:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
@@ -301,7 +301,7 @@ jobs:
       - run: git diff --staged --exit-code --stat
 
   tidy:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/setup-go
@@ -356,7 +356,7 @@ jobs:
       - run: npx hereby check:scripts
 
   required:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-slim
     if: ${{ always() }}
     needs:
       - build