docs: fix bad link

subjects/ascii-art/color/README.md

@@ -35,7 +35,7 @@ Additionally, the program must still be able to run with a single `[STRING]` arg
 
 ### Allowed packages
 
-- Only the [standard Go](https://pkg.go.dev/std) packages are allowed
+- Only the [standard Go](https://golang.org/pkg) packages are allowed
 
 This project will help you learn about :
 

subjects/ascii-art/color/audit/README.md

@@ -1,6 +1,6 @@
 #### Functional
 
-###### Has the requirement for the allowed packages been respected? (Reminder for this project: only [standard packages](https://pkg.go.dev/std))
+###### Has the requirement for the allowed packages been respected? (Reminder for this project: only [standard packages](https://golang.org/pkg/) )
 
 ##### Try passing as arguments `--color red "banana" `.