Update run-make/issue-88756-default-output test

Author: GuillaumeGomez

tests/run-make/issue-88756-default-output/output-default.stdout

@@ -191,6 +191,8 @@ Options:
                         removed, see issue #44136
                         <https://github.com/rust-lang/rust/issues/44136> for
                         more information
+        --html-no-source 
+                        Disable HTML source code pages generation
 
     @path               Read newline separated options from `path`