Update GitHub workflow

Signed-off-by: Agustín Martínez Fayó <amartinezfayo@gmail.com>

.github/workflows/pr_build.yaml

@@ -2,8 +2,6 @@ name: PR Build
 on:
   pull_request: {}
   workflow_dispatch: {}
-env:
-  GO_VERSION: 1.23
 permissions:
   contents: read
 
@@ -29,11 +27,13 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Setup go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: ${{ env.GO_VERSION }}
+          cache: true
+          cache-dependency-path: go.sum
+          go-version-file: go.mod
       - name: Run unit tests
         run: make test
 
@@ -46,4 +46,3 @@ jobs:
     steps:
       - name: Shout it out
         run: echo SUCCESS
-