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>

charts/fission-core/templates/NOTES.txt

@@ -15,7 +15,7 @@ Windows:
   $ fission env create --name nodejs --image fission/node-env
 
   # Get a hello world
-  $ curl https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello.js > hello.js
+  $ curl https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js > hello.js
 
   # Register this function with Fission
   $ fission function create --name hello --env nodejs --code hello.js