Update GitHub credentials to use environment variables

Replaced hardcoded GitHub username with environment variable `GITHUB_ACTOR`. This improves security by preventing the exposure of sensitive information in the codebase.

build.gradle.kts

@@ -273,7 +273,7 @@ subprojects {
 				name = "Github"
 				url = uri("https://maven.pkg.github.com/${properties["publishingGitHubRepo"]}")
 				credentials {
-					username = "PandaDap2006"
+					username = System.getenv("GITHUB_ACTOR")
 					password = System.getenv("GITHUB_TOKEN")
 				}
 			}