ci(codeql-analysis): fix the workflow by using go1.21

This workflow has been failing for a while because it's been using
go1.20, which is incompatible with the go.mod file generated by go1.21
:/.

I found this solution from:
github/codeql-action#1842 (comment).

.github/workflows/codeql-analysis.yml

@@ -40,6 +40,11 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
+    - name: Install Go
+      uses: actions/setup-go@v4
+      with:
+        go-version-file: go.mod
+
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v2