added note to find doc example

...that regular find without regex is case insensitive.

crates/nu-command/src/filters/find.rs

@@ -70,8 +70,8 @@ impl Command for Find {
                 result: None,
             },
             Example {
-                description: "Search and highlight text for a term in a string",
-                example: r#"'Cargo.toml' | find toml"#,
+                description: "Search and highlight text for a term in a string. Note that regular search is case insensitive",
+                example: r#"'Cargo.toml' | find Cargo"#,
                 result: Some(Value::test_string("\u{1b}[37mCargo.\u{1b}[0m\u{1b}[41;37mtoml\u{1b}[0m\u{1b}[37m\u{1b}[0m".to_owned())),
             },
             Example {