In GH PR review page, headers have redundant url content (#7511)

Fixes #7509

Author: alexr00

webviews/components/user.tsx

@@ -10,7 +10,7 @@ import { Icon } from './icon';
 const InnerAvatar = ({ for: author }: { for: Partial<IAccount> }) => (
 	<>
 		{author.avatarUrl ? (
-			<img className="avatar" src={author.avatarUrl} alt="" role="presentation" />
+			<img className="avatar" src={author.avatarUrl} alt="" role="presentation" aria-hidden="true"/>
 		) : (
 			<Icon className="avatar-icon" src={require('../../resources/icons/dark/github.svg')} />
 		)}
@@ -19,7 +19,7 @@ const InnerAvatar = ({ for: author }: { for: Partial<IAccount> }) => (
 
 export const Avatar = ({ for: author, link = true, substituteIcon }: { for: Partial<IAccount>, link?: boolean, substituteIcon?: JSX.Element }) => {
 	if (link) {
-		return <a className="avatar-link" href={author.url} title={author.url}>
+		return <a className="avatar-link" href={author.url} title={author.url} aria-hidden="true">
 			{substituteIcon ?? <InnerAvatar for={author} />}
 		</a>;
 	} else {