python-typing: rewrap Config.in help text

Fixes the following check-package warning:

package/python-typing/Config.in:5: help text: <tab><2 spaces><62 chars> (http://nightly.buildroot.org/#writing-rules-config-in)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/python-typing/Config.in

@@ -2,7 +2,7 @@ config BR2_PACKAGE_PYTHON_TYPING
 	bool "python-typing"
 	depends on BR2_PACKAGE_PYTHON
 	help
-	  Type Hints for Python. This is a backport of the standard library
-	  typing module to Python versions older than 3.5.
+	  Type Hints for Python. This is a backport of the standard
+	  library typing module to Python versions older than 3.5.
 
 	  https://docs.python.org/3/library/typing.html