Change examples references to examples repostiory (#2038)

Since we recently migrated all fission examples to fission/examples repository, we need to change
respective references.

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

README.md

@@ -72,7 +72,7 @@ aggregation — also helps with ops on your Fission deployment.
   $ fission env create --name nodejs --image fission/node-env
 
   # Create a function with a javascript one-liner that prints "hello world"
-  $ fission function create --name hello --env nodejs --code https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello.js
+  $ fission function create --name hello --env nodejs --code https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js
 
   # Run the function.  This takes about 100msec the first time.
   $ fission function test --name hello