highlights(ocaml): change order or captures

This because the later captures have more priority in neovim, not less
like in upstream.

This fixes highlighting highlighting for let* and +, for example.

queries/ocaml/highlights.scm

@@ -85,30 +85,6 @@
   (pretty_printing_indication)
 ] @punctuation.special
 
-; Operators
-;----------
-
-(match_expression (match_operator) @keyword)
-
-(value_definition [(let_operator) (and_operator)] @keyword)
-
-[
-  (prefix_operator)
-  (infix_operator)
-  (indexing_operator)
-  (let_operator)
-  (and_operator)
-  (match_operator)
-] @operator
-
-(prefix_operator "!" @operator)
-
-(infix_operator ["&" "+" "-" "=" ">" "|" "%"] @operator)
-
-(signed_number ["+" "-"] @operator)
-
-["*" "#" "::" "<-"] @operator
-
 ; Keywords
 ;---------
 
@@ -150,6 +126,30 @@
   "->" ";;" ":>" "+=" ":=" ".."
 ] @punctuation.delimiter
 
+; Operators
+;----------
+
+[
+  (prefix_operator)
+  (infix_operator)
+  (indexing_operator)
+  (let_operator)
+  (and_operator)
+  (match_operator)
+] @operator
+
+(match_expression (match_operator) @keyword)
+
+(value_definition [(let_operator) (and_operator)] @keyword)
+
+(prefix_operator "!" @operator)
+
+(infix_operator ["&" "+" "-" "=" ">" "|" "%"] @operator)
+
+(signed_number ["+" "-"] @operator)
+
+["*" "#" "::" "<-"] @operator
+
 ; Attributes
 ;-----------