Update process.rst

This PR updates the text on the Process docs from "double brackets" which to a lot of people would mean `[[]]` to "double quotations" `""` as demonstrated in the code example for the prepared statement.

Author: matthewtrask

components/process.rst

@@ -378,7 +378,7 @@ Using a Prepared Command Line
 -----------------------------
 
 You can run the process by using a a prepared command line using the
-double bracket notation. You can use a placeholder in order to have a
+double quotation notation. You can use a placeholder in order to have a
 process that can only be changed with the values and without changing
 the PHP code::