Update templated README.md file

Author: anitarua

examples/web/cache/README.md

@@ -68,7 +68,7 @@ Run the example using:
 
 ```bash
 # Run example code
-V1_API_KEY=<YOUR V1 API KEY> npm run tokens
+MOMENTO_API_KEY=<YOUR API KEY> MOMENTO_ENDPOINT=<YOUR ENDPOINT> npm run tokens
 ```
 
 If you have deployed a token vending machine to generate disposable tokens like so: