[googlefonts.py] modify ttfa param testing string literal
See
@@ -977,7 +977,7 @@ def com_google_fonts_check_has_ttfautohint_params(ttFont):
yield PASS, f"Font has ttfautohint params ({params})"
failed = False
else:
- yield SKIP, "Font is not hinted using ttfautohint."
+ yield SKIP, "Font appears to our heuristic as not hinted using ttfautohint."
failed = False
if failed:
