docs: Update README

Signed-off-by: Dmitry Dygalo <dmitry@dygalo.dev>
Stranger6667 · Sep 13, 2024 · 52de3ae · 52de3ae
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diff --git a/crates/jsonschema-cli/README.md b/crates/jsonschema-cli/README.md
@@ -14,6 +14,8 @@ cargo install jsonschema-cli
 jsonschema [OPTIONS] <SCHEMA>
 ```
 
+**NOTE**: It only supports valid JSON as input.
+
 ### Options:
 
 - `-i, --instance <FILE>`: JSON instance(s) to validate (can be used multiple times)