patch 8.2.2620: Vim9: Using #{ for a dictionary gives strange errors

Problem:    Vim9: Using #{ for a dictionary gives strange errors.
Solution:   Give an error when using #{ for a comment after a command.
diff --git a/src/errors.h b/src/errors.h
index c1dc547..ed55304 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -375,3 +375,5 @@
 	INIT(= N_("E1168: Argument already declared in the script: %s"));
 EXTERN char e_import_as_name_not_supported_here[]
 	INIT(= N_("E1169: 'import * as {name}' not supported here"));
+EXTERN char e_cannot_use_hash_curly_to_start_comment[]
+	INIT(= N_("E1170: 'Cannot use #{ to start a comment"));