Added instructions to update loaih over PyPI.

Batch.md

@@ -90,7 +90,7 @@ ones).
 
 The script would build all the AppImages silently by default (and likely,
 seemingly stuck); if you need to follow the building process, use the `-v` (or
-`--verbose`) flag (which is the only option available for the `batch` verb.
+`--verbose`) flag, which is the only option available for the `batch` verb.
 
 
 ## Remote repositories ##

Install.md

@@ -54,6 +54,10 @@ it directly from [PyPI](https://pypi.org/project/loaih/):
 
     pip install loaih
 
+Upgrading to new versions of `loaih` is easier with `pip`, also:
+
+    pip install --upgrade loaih
+
 
 ## Test that `loaih` works ##