Update .env description

Comment was dated so update with the current state.

Bug: none
Change-Id: Iaf03d351b5a5761f623f43ea3beedaa3d38c2cc5
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7105541
Reviewed-by: Mathias Bynens <[email protected]>
Commit-Queue: Mathias Bynens <[email protected]>
Auto-Submit: Nikolay Vitkov <[email protected]>
Commit-Queue: Nikolay Vitkov <[email protected]>

Author: Lightning00Blade

.env.template

@@ -1,5 +1,6 @@
-# This files is to be used when calling node script
-# Use --env-file-if-exists to make it optional
+# This file gets picked up from NodeJS script that use `./scripts/env-utils.mjs`
+# There it's loaded via `import { loadEnvFile } from 'node:process';`
+# https://nodejs.org/api/process.html#processloadenvfilepath
 DEVTOOLS_BROWSER=
 DEVTOOLS_UNSTABLE_FEATURES=
 DEVTOOLS_ENABLE_FEATURES=