Pontoon: Update Kabyle (kab) localization of Mozilla Activate

Localization authors:
- K_ahina <kahinamessaoudi03@gmail.com>

public/locales/kab/activate.ftl

@@ -124,7 +124,7 @@ webext-duration = 1,5-3 n yisragen
 commonvoice-title = Ttekki deg Common Voice
 commonvoice-duration = Ameskil
 rust-title = Issin Rust
-rust-duration = 2-3 n yesragen
+rust-duration = 2-3 n yisragen
 webvr-title = WebVR Camp
 webvr-duration = 3-4 n yesragen
 webcompat-duration = 2-3 n yesragen