Accordion: allow font style inheritance from button to inner text blocks. (#72957)

Co-authored-by: ramonjd <ramonopoly@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>

Author: ramonjd

packages/block-library/src/accordion-heading/style.scss

@@ -7,6 +7,7 @@
 	text-transform: inherit;
 	text-decoration: inherit;
 	word-spacing: inherit;
+	font-style: inherit;
 	background: none;
 	border: none;
 	color: inherit;