Update README.md (tensorflow#188)

https://github.com/tensorflow/tflite-micro - link was not working.  Edited  with the full url and also fixed double colon to single colon.

Author: videvelop

README.md

@@ -71,10 +71,10 @@ This code is made available under the Apache 2 license.
 ## Contributing
 
 Forks of this library are welcome and encouraged. If you have bug reports or
-fixes to contribute, the source of this code is at [https:://github.com/tensorflow/tflite-micro](github.com/tensorflow/tflite-micro)
+fixes to contribute, the source of this code is at [https://github.com/tensorflow/tflite-micro](http://github.com/tensorflow/tflite-micro)
 and all issues and pull requests should be directed there.
 
 The code here is created through an automatic project generation process
 and may differ from
 that source of truth, since it's cross-platform and needs to be modified to
-work within the Arduino IDE.
+work within the Arduino IDE.