Fix spelling of "Lets" on the onboarding page after clicking the confirmation email (#24959)

Co-authored-by: Steven Munn <stevenjmunn@gmail.com>
Co-authored-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/mastodon/features/onboarding/index.jsx

@@ -115,7 +115,7 @@ class Onboarding extends ImmutablePureComponent {
 
           <div className='onboarding__steps'>
             <Step onClick={this.handleProfileClick} href='/settings/profile' completed={(!account.get('avatar').endsWith('missing.png')) || (account.get('display_name').length > 0 && account.get('note').length > 0)} icon='address-book-o' label={<FormattedMessage id='onboarding.steps.setup_profile.title' defaultMessage='Customize your profile' />} description={<FormattedMessage id='onboarding.steps.setup_profile.body' defaultMessage='Others are more likely to interact with you with a filled out profile.' />} />
-            <Step onClick={this.handleFollowClick} completed={(account.get('following_count') * 1) >= 7} icon='user-plus' label={<FormattedMessage id='onboarding.steps.follow_people.title' defaultMessage='Follow {count, plural, one {one person} other {# people}}' values={{ count: 7 }} />} description={<FormattedMessage id='onboarding.steps.follow_people.body' defaultMessage='You curate your own feed. Lets fill it with interesting people.' />} />
+            <Step onClick={this.handleFollowClick} completed={(account.get('following_count') * 1) >= 7} icon='user-plus' label={<FormattedMessage id='onboarding.steps.follow_people.title' defaultMessage='Follow {count, plural, one {one person} other {# people}}' values={{ count: 7 }} />} description={<FormattedMessage id='onboarding.steps.follow_people.body' defaultMessage="You curate your own feed. Let's fill it with interesting people." />} />
             <Step onClick={this.handleComposeClick} completed={(account.get('statuses_count') * 1) >= 1} icon='pencil-square-o' label={<FormattedMessage id='onboarding.steps.publish_status.title' defaultMessage='Make your first post' />} description={<FormattedMessage id='onboarding.steps.publish_status.body' defaultMessage='Say hello to the world.' />} />
             <Step onClick={this.handleShareClick} completed={shareClicked} icon='copy' label={<FormattedMessage id='onboarding.steps.share_profile.title' defaultMessage='Share your profile' />} description={<FormattedMessage id='onboarding.steps.share_profile.body' defaultMessage='Let your friends know how to find you on Mastodon!' />} />
           </div>

app/javascript/mastodon/locales/defaultMessages.json

@@ -3236,7 +3236,7 @@
         "id": "onboarding.steps.follow_people.title"
       },
       {
-        "defaultMessage": "You curate your own feed. Lets fill it with interesting people.",
+        "defaultMessage": "You curate your own feed. Let's fill it with interesting people.",
         "id": "onboarding.steps.follow_people.body"
       },
       {