docs: hwmon: tmp103.rst: fix bad usage of UTF-8 chars

While UTF-8 characters can be used at the Linux documentation,
the best is to use them only when ASCII doesn't offer a good replacement.
So, replace the occurences of the following UTF-8 characters:

	- U+2013 ('–'): EN DASH

In this specific case, EN DASH was used instead of a minus
sign. So, replace it by a single hyphen.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/73b3c7c1eef5c12ddc941624d23689313bd56529.1620744606.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/hwmon/tmp103.rst

@@ -21,10 +21,10 @@ Description
 The TMP103 is a digital output temperature sensor in a four-ball
 wafer chip-scale package (WCSP). The TMP103 is capable of reading
 temperatures to a resolution of 1°C. The TMP103 is specified for
-operation over a temperature range of –40°C to +125°C.
+operation over a temperature range of -40°C to +125°C.
 
 Resolution: 8 Bits
-Accuracy: ±1°C Typ (–10°C to +100°C)
+Accuracy: ±1°C Typ (-10°C to +100°C)
 
 The driver provides the common sysfs-interface for temperatures (see
 Documentation/hwmon/sysfs-interface.rst under Temperatures).