Update code_editor.py - wrong url in error msg

Error msg is linking to https://harlequin.sh/docs/troubleshooting#copying-and-pasting
but this is the correct link:
https://harlequin.sh/docs/troubleshooting/copying-and-pasting

See issue: tconbeer#509

src/harlequin/components/code_editor.py

@@ -98,7 +98,7 @@ def on_text_area_clipboard_error(self) -> None:
         if not self.has_shown_clipboard_error:
             self.app.notify(
                 "Could not access system clipboard.\n"
-                "See https://harlequin.sh/docs/troubleshooting#copying-and-pasting",
+                "See https://harlequin.sh/docs/troubleshooting/copying-and-pasting",
                 severity="error",
                 timeout=10,
             )