[Docs][llvm-mc] Fix location of statement

The comment moved is referring to the --output-asm-syntax flag rather
than the --print-imm-hex flag, but seems to have mistakenly been put
under the definition of that flag due to some misplaced line numbers on
phabricator.

Author: boomanaiden154

llvm/docs/CommandGuide/llvm-mc.rst

@@ -138,17 +138,16 @@ End-user Options
 .. option:: --print-imm-hex      
 
  Prefer hex format for immediate values.
- For example, on x86 targets --output-asm-variant=0 prints in AT&T syntax, and --output-asm-variant=1 prints in 
- Intel/MASM syntax.
 
 .. option::  --preserve-comments 
 
  Preserve Comments in outputted assembly.
 
 .. option:: --output-asm-variant=<uint>
 
- Syntax variant to use for output printing.
-
+ Syntax variant to use for output printing. For example, on x86 targets
+ --output-asm-variant=0 prints in AT&T syntax, and --output-asm-variant=1 prints
+ in Intel/MASM syntax.
 
 .. option:: --compress-debug-sections=[none|zlib|zstd]