Add contributors

Author: moxwel

README.txt

@@ -6,7 +6,6 @@
     Understand your enchantments!
 
     By: Moxwel >> https://www.planetminecraft.com/member/moxwel/
-    1.20 update by: SonicCraft
 
     Tested on Minecraft:
     - 1.15.2
@@ -16,5 +15,13 @@
     - 1.17.1
     - 1.19.3
     - 1.20.0
+    - 1.20.1
+
+ [ Contributors ]
+
+    MrZeffy
+    coco_fish82
+    Doge42
+    SonicCraft
 
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