Fix location/file name

Author: martin3000

doc/README.md

@@ -4,7 +4,7 @@ This directory contains documentation on the use and implementation of the LMIC.
 
 ## Usage documentation
 
-- [`LMIC-v3.0.99.pdf`](./LoRaWAN-v3.0.99.pdf): API documentation on the LMIC as of 3.0.99. Generally the differences between 3.0.99 and 3.2 were bug fixes.
+- [`LMIC-v3.0.99.pdf`](./LMIC-v3.0.99.pdf): API documentation on the LMIC as of 3.0.99. Generally the differences between 3.0.99 and 3.2 were bug fixes.
 
 ## Background information