Issue #15187 - Nightly update message should refer to Firefox Labs in…

…stead of Nightly Experiments

- Create a new string for the page with id nightly-whatsnew-want-to-know-which-v3
- Add a new -brand-name-firefox-labs string for Firefox Labs in brands.ftl

bedrock/firefox/templates/firefox/nightly/whatsnew.html

@@ -65,7 +65,7 @@ <h4 class="mzp-c-callout-title">¿Quieres ayudar en España?</h4>
 
       <p>
           {% set attrs = 'href="#" class="nightly-experiments-link"' %}
-          {{ ftl('nightly-whatsnew-want-to-know-which-v2', attrs=attrs) }}
+          {{ ftl('nightly-whatsnew-want-to-know-which-v3', attrs=attrs) }}
         </p>
 
       <p>{{ ftl('nightly-whatsnew-do-you-experience', bugzilla='https://bugzilla.mozilla.org') }}</p>

l10n/en/brands.ftl

@@ -90,6 +90,9 @@
 -brand-name-firefox-private-network = Firefox Private Network
 -brand-name-fpn = FPN
 
+## Firefox projects
+-brand-name-firefox-labs = Firefox Labs
+
 ## Pocket
 
 -brand-name-pocket = Pocket

l10n/en/firefox/nightly/whatsnew.ftl

@@ -25,6 +25,7 @@ nightly-whatsnew-if-you-want-to-v3 = If you want to know what’s happening arou
 # Variables:
 #   $attrs (string) - link href and additional attributes
 nightly-whatsnew-want-to-know-which-v2 = Want to know which platform features you could test on { -brand-name-nightly } and can’t see yet on other { -brand-name-firefox } channels? Then have a look at the <a { $attrs }>Nightly Experiments</a> preferences page.
+nightly-whatsnew-want-to-know-which-v3 = Want to know which platform features you could test on { -brand-name-nightly } and can’t see yet on other { -brand-name-firefox } channels? Then have a look at the <a { $attrs }>{ -brand-name-firefox-labs }</a> preferences page.
 
 # Variables:
 #   $bugzilla (url) - link to https://bugzilla.mozilla.org/