chore: add support for GitHub actions in codeql (scaleway#4901)

Author: remyleone

.github/workflows/codeql-analysis.yml

@@ -24,7 +24,7 @@ jobs:
       matrix:
         # Override automatic language detection by changing the below list
         # Supported options are ['csharp', 'cpp', 'go', 'java', 'javascript', 'python']
-        language: ['go']
+        language: ['go', 'actions']
         # Learn more...
         # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection