scripted-diff: replace ⛰ emoji with $ [skip ci]

-BEGIN VERIFY SCRIPT-
sed -i 's/⛰/$/g' $(git grep -l '⛰')
-END VERIFY SCRIPT-

docs/grpc/javascript.md

@@ -123,7 +123,7 @@ invoice.
 
 This example has a few dependencies:
 ```shell
-⛰  npm install --save async lodash bytebuffer
+$  npm install --save async lodash bytebuffer
 ```
 
 You can run the following in your shell or put it in a program and run it like