ci: Bump actions/checkout to v4

.github/workflows/main.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run load test using action code from commit
         uses: ./
         with:

README.md

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run k6 local test
         uses: grafana/k6-action@v0.3.0
         with:
@@ -44,7 +44,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Run k6 cloud test
         uses: grafana/k6-action@v0.3.0
         with:
@@ -139,16 +139,16 @@ jobs:
 
     services:
       quickpizza:
-        image: ghcr.io/grafana/quickpizza-local:0.2.0
+        image: ghcr.io/grafana/quickpizza-local:0.4.0
         ports:
           - 3333:3333
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v1
+        uses: actions/checkout@v4
 
       - name: Run local k6 test
-        uses: grafana/k6-action@v0.2.0
+        uses: grafana/k6-action@v0.3.0
         with:
           filename: script.js
         env:
@@ -166,7 +166,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install k6
         run: |
           curl https://github.com/grafana/k6/releases/download/v0.44.0/k6-v0.44.0-linux-amd64.tar.gz -L | tar xvz --strip-components 1