chore: disable overly noisy vale checks (#1352)

Author: devalog

.vale.ini

@@ -16,4 +16,7 @@ Microsoft.Acronyms = NO # Handled in FernStyles
 Microsoft.Vocab = NO # Too granular for now
 Microsoft.HeadingAcronyms = NO # Not relevant for Fern audience
 Microsoft.GeneralURL = NO # Not relevant for Fern audience
+Microsoft.Passive = NO # Too noisy
+Microsoft.Accessibility = NO # Too noisy
+