docs: hwmon: ir36021.rst: replace some characters

The conversion tools used during DocBook/LaTeX/html/Markdown->ReST
conversion and some cut-and-pasted text contain some characters that
aren't easily reachable on standard keyboards and/or could cause
troubles when parsed by the documentation build system.

Replace the occurences of the following characters:

	- U+2010 ('‐'): HYPHEN
	  as ASCII HYPHEN is preferred over U+2010
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/ba8b5122ac9d4918fd966d0eb0a5ca9d89044b04.1621159997.git.mchehab+huawei@kernel.orgSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/hwmon/ir36021.rst

@@ -19,7 +19,7 @@ Authors:
 Description
 -----------
 
-The IR36021 is a dual‐loop digital multi‐phase buck controller designed for
+The IR36021 is a dual-loop digital multi-phase buck controller designed for
 point of load applications.
 
 Usage Notes