queries: rust: highlight number constants correctly.

runtime/queries/rust/highlights.scm

@@ -116,13 +116,15 @@
 
 (self) @variable.builtin
 
-(char_literal) @string
+[
-(string_literal) @string
+(char_literal)
-(raw_string_literal) @string
+(string_literal)
+(raw_string_literal)
+] @string
 
 (boolean_literal) @constant.builtin
-(integer_literal) @constant.builtin
+(integer_literal) @number
-(float_literal) @constant.builtin
+(float_literal) @number
 
 (escape_sequence) @escape