runtime(doc): Fix typos in syntax.txt

closes: #18504

Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Elijah Greenstein <197816462+elijahgreenstein@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

Author: 2 people

runtime/doc/syntax.txt

@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2025 Oct 04
+*syntax.txt*	For Vim version 9.1.  Last change: 2025 Oct 07
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -6492,10 +6492,10 @@ faster.  To see slowness switch on some features that usually interfere, such
 as 'relativenumber' and |folding|.
 
 Note: This is only available when compiled with the |+profile| feature.
-You many need to build Vim with "huge" features.
+You may need to build Vim with "huge" features.
 
-To find out what patterns are consuming most time, get an overview with this
-sequence: >
+To find out what patterns are consuming the most time, get an overview with
+this sequence: >
 	:syntime on
 	[ redraw the text at least once with CTRL-L ]
 	:syntime report