docs: update readme

README.md

@@ -51,6 +51,7 @@ return {
 The plugin comes with the following commands:
 
 - `PasteImage` Inserts the image from the clipboard into the document.
+- `ImgClipDebug` Prints the debug log, including the output of shell commands.
 
 Consider binding `PasteImage` to something like `<leader>p`.