Update README.md

Co-authored-by: CodeShell <122738806+CodeShellDev@users.noreply.github.com>

Author: github-actions[bot]

README.md

@@ -262,14 +262,13 @@ Returns global value at key.
 Defines a global function.
 
 ```
-funcDefine "name" "{{{ return 0 "Hello World" }}}"
+funcDefine "name" `
+    {{{ return 0 "Hello World" }}}
+`
 ```
 
 The second argument is the template body, notice the `{{{ ... }}}` instead of `$​{​{​{ ... }​}​}`.
 
-> [!WARNING]
-> You may need to escape some characters like `"` with `\`
-
 Raw output is discarded only output via [`return`](#return) persists.
 
 ##### `return`