corrected v3 docs link

Author: jakewmeyer

README.md

@@ -17,7 +17,7 @@
 ## V3 preview
 * API V3 will be released towards the end of September 2018
 * V2 will remain available indefinitely, and the data will continue to be updated
-* V3 docs preview located [here](https://documenter.getpostman.com/view/2025350/RWaEzAiG#46951cda-bdf2-481b-9697-118b1cbccaba)
+* V3 docs preview located [here](https://documenter.getpostman.com/view/2025350/RWaEzAiG)
 
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