fix(deps): update module github.com/google/go-github/v74 to v78

Author: renovate[bot]

go.mod

@@ -4,7 +4,7 @@ go 1.23.0
 
 require (
 	github.com/golang-jwt/jwt/v5 v5.3.0
-	github.com/google/go-github/v74 v74.0.0
+	github.com/google/go-github/v78 v78.0.0
 	github.com/hashicorp/terraform-plugin-framework v1.15.1
 	github.com/hashicorp/terraform-plugin-framework-validators v0.18.0
 	github.com/hashicorp/terraform-plugin-go v0.28.0