Bump the versions of the checkout and cache actions

Author: bbatsov

.github/workflows/build.yml

@@ -9,8 +9,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/checkout@v4
+      - uses: actions/cache@v4
         with:
           path: ~/.m2
           key: v1-dependencies-${{ hashFiles('project.clj') }}