fix(ruby): improve highlights for pattern matching and for...in loops

runtime/queries/ruby/highlights.scm

@@ -48,6 +48,9 @@
   "then"
 ] @keyword.conditional
 
+(in_clause
+  "in" @keyword.conditional)
+
 (if
   "end" @keyword.conditional)
 
@@ -61,6 +64,9 @@
   "next"
 ] @keyword.repeat
 
+(in
+  "in" @keyword.repeat)
+
 (constant) @constant
 
 ((identifier) @keyword.modifier
@@ -291,6 +297,9 @@
 (pair
   ":" @punctuation.delimiter)
 
+(keyword_pattern
+  ":" @punctuation.delimiter)
+
 [
   "("
   ")"