fix: pyexif lib name

README.md

@@ -24,7 +24,7 @@ Helpful when your DSLR camera **have no gps**, but your phone **have**
 ## What I need to run?
 
 * Make sure you have `Python 3`
-* Install library `piexif` in your Python installation, typically `pip install piexif`  
+* Install library `pyexif` in your Python installation, typically `pip install pyexif`  
 * Your phone and camera should be **time-synchronized** for app to work out-of-box  
 If not, you can adjust time with `HOURS_UTC_OFFSET_GPX`, `HOURS_UTC_OFFSET_JPG` values
 *