src: fix deprecation id for non-string env value

This is a follow-up of #18990. A new
deprecation id was assigned in it, but it was not reflected in code and
test.

PR-URL: #19209
Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>

src/node.cc

@@ -2667,7 +2667,7 @@ static void EnvSetter(Local<Name> property,
           "Assigning any value other than a string, number, or boolean to a "
           "process.env property is deprecated. Please make sure to convert the "
           "value to a string before setting process.env with it.",
-          "DEP00XX").IsNothing())
+          "DEP0104").IsNothing())
       return;
   }
 #ifdef __POSIX__

test/parallel/test-process-env-deprecation.js

@@ -9,7 +9,7 @@ common.expectWarning(
   'Assigning any value other than a string, number, or boolean to a ' +
   'process.env property is deprecated. Please make sure to convert the value ' +
   'to a string before setting process.env with it.',
-  'DEP00XX'
+  'DEP0104'
 );
 
 process.env.ABC = undefined;