Update README.md

Author: github-actions[bot]

README.md

@@ -261,13 +261,13 @@ Placeholders can be added by setting `VARIABLES` inside your Environment.
 ```yaml
 environment:
   VARIABLES: |
-	"NUMBER2": "002",
-	"GROUP_CHAT_1": [
-		"user.id", 
-		"000", 
-		"001", 
-		"group.id"
-	]
+    "NUMBER2": "002",
+    "GROUP_CHAT_1": [
+      "user.id", 
+      "000", 
+      "001", 
+      "group.id"
+    ]
 ```
 
 ### Recipients