Use K6_VERSION instead of latest

Apply suggestion from @inancgumus

Co-authored-by: Inanc Gumus <inanc.gumus@grafana.com>

Author: ankur22

docs/sources/k6/v1.3.x/using-k6-browser/migrate-from-playwright-to-k6.md

@@ -383,7 +383,7 @@ user  ✓ [======================================] 1 VUs  00m06.0s/10m0s  1/1 sh
 
 ### Test isolation patterns
 
-In k6, [scenarios](https://grafana.com/docs/k6/latest/using-k6/scenarios/) let you configure and model diverse workloads and organize your tests. Playwright has a dedicated testing framework. This difference stems from k6 being a performance testing tool.
+In k6, [scenarios](https://grafana.com/docs/k6/<K6_VERSION>/using-k6/scenarios/) let you configure and model diverse workloads and organize your tests. Playwright has a dedicated testing framework. This difference stems from k6 being a performance testing tool.
 
 {{< admonition type="note" >}}