docs: exit code zero is not an error (#1811)

Author: SamuelMarks

website/docs/reference/cli.mdx

@@ -53,9 +53,10 @@ If `--` is given, all remaining arguments will be assigned to a special
 ## Exit Codes
 
 Task will sometimes exit with specific exit codes. These codes are split into
-three groups with the following ranges:
+four groups with the following ranges:
 
-- General errors (0-99)
+- Success (0)
+- General errors (1-99)
 - Taskfile errors (100-199)
 - Task errors (200-299)
 

website/versioned_docs/version-latest/reference/cli.mdx

@@ -53,9 +53,10 @@ If `--` is given, all remaining arguments will be assigned to a special
 ## Exit Codes
 
 Task will sometimes exit with specific exit codes. These codes are split into
-three groups with the following ranges:
+four groups with the following ranges:
 
-- General errors (0-99)
+- Success (0)
+- General errors (1-99)
 - Taskfile errors (100-199)
 - Task errors (200-299)