Update actions/checkout action to v4

Author: renovate[bot]

.github/workflows/generate-sdk.yml

@@ -10,7 +10,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: Checkout code
-              uses: actions/checkout@v2
+              uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
             - name: Use Node.js
               uses: actions/setup-node@v2

.github/workflows/sonar-cloud.yml

@@ -10,7 +10,7 @@ jobs:
     name: SonarCloud
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0 
       - name: SonarCloud Scan