ci(github): update action/checkout from v2 to v3

Signed-off-by: Luís Ferreira <contact@lsferreira.net>

.github/workflows/codeql-analysis.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/test.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
 
     - name: Set Node.js 12.x
       uses: actions/setup-node@v1