fix inline code formatting in helm install

docs/helm/helm_install.md

@@ -27,6 +27,7 @@ or
 	$ helm install --set-string long_int=1234567890 ./redis
 
 or
+
 	$ helm install --set-file multiline_text=path/to/textfile
 
 You can specify the '--values'/'-f' flag multiple times. The priority will be given to the