[ZT] Fix DEX data retention period (#17600)

* Update view-results.mdx

* Update view-results.mdx

Author: ranbel

src/content/docs/cloudflare-one/insights/dex/tests/view-results.mdx

@@ -32,10 +32,10 @@ To view analytics on a per-device level:
 
 ## Data retention
 
-Test results are stored for the following amount of time:
+DEX stores test results for the following amount of time:
 
 | Zero Trust plan | Duration |
 | --------------- | -------- |
 | **Free**        | 24 hours |
-| **Standard**    | 15 days  |
-| **Enterprise**  | 15 days  |
+| **Standard**    | 7 days   |
+| **Enterprise**  | 7 days   |