fix(editor): Expand range of allowed characters in expressions (#9083)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/editor-ui/src/plugins/codemirror/resolvableHighlighter.ts

@@ -15,7 +15,6 @@ const cssClasses = {
 	validResolvable: 'cm-valid-resolvable',
 	invalidResolvable: 'cm-invalid-resolvable',
 	pendingResolvable: 'cm-pending-resolvable',
-	brokenResolvable: 'cm-broken-resolvable',
 	plaintext: 'cm-plaintext',
 };
 
@@ -129,10 +128,6 @@ const resolvableStyle = syntaxHighlighting(
 			tag: tags.content,
 			class: cssClasses.plaintext,
 		},
-		{
-			tag: tags.className,
-			class: cssClasses.brokenResolvable,
-		},
 		/**
 		 * CSS classes for valid and invalid resolvables
 		 * dynamically applied based on state fields