Clarify that init is once per VU

Closes: 
#1124

Author: MattDodsonEnglish

src/data/markdown/translated-guides/en/02 Using k6/06 Test lifecycle.md

@@ -59,12 +59,14 @@ For examples and implementation details of each stage, refer to the subsequent s
 
 **The init stage is required**.
 Before the test runs, k6 needs to initialize the test conditions.
-To prepare the test, the code in the `init` context:
+To prepare the test, code in the `init` context runs once per VU.
 
-- Imports modules
-- Loads files from the local file system
-- Configures the test for all `options`
-- Defines lifecycle functions for the VU, `setup`, and `teardown` stages (and for custom or `handleSummary()` functions, too).
+Some operations that might happen in `init` include the following:
+
+- Import modules
+- Load files from the local file system
+- Configure the test for all `options`
+- Define lifecycle functions for the VU, `setup`, and `teardown` stages (and for custom or `handleSummary()` functions, too).
 
 
 **All code that is outside of a lifecycle function is code in the `init` context**.