Remove $ from curl command

It makes copying the command annoying since you have to delete the $.

Author: code-asher

README.md

@@ -80,7 +80,7 @@ One way to test this is to make a query and check one of the URLs in the
 response:
 
 ```console
-$ curl 'https://example.com/api/extensionquery' -H 'Accept: application/json;api-version=3.0-preview.1' --compressed -H 'Content-Type: application/json' --data-raw '{"filters":[{"criteria":[{"filterType":8,"value":"Microsoft.VisualStudio.Code"}],"pageSize":1}],"flags":439}' | jq .results[0].extensions[0].versions[0].assetUri
+curl 'https://example.com/api/extensionquery' -H 'Accept: application/json;api-version=3.0-preview.1' --compressed -H 'Content-Type: application/json' --data-raw '{"filters":[{"criteria":[{"filterType":8,"value":"Microsoft.VisualStudio.Code"}],"pageSize":1}],"flags":439}' | jq .results[0].extensions[0].versions[0].assetUri
 "https://example.com/assets/vscodevim/vim/1.24.1"
 ```