Hide swag CTA on the Why Fleet docs page (it's kinda weird because it's like "we just met...") (#44269)

## Summary

- Hides the "Request Fleet swag" sidebar CTA on the
`/docs/get-started/why-fleet` page (the default docs landing page)
- Adds `'Why Fleet'` to the title exclusion list in the `v-if` condition
on the right-sidebar swag CTA in
`website/views/pages/docs/basic-documentation.ejs`
- The swag CTA continues to appear on all other docs pages as before

## Changes

**`website/views/pages/docs/basic-documentation.ejs`** (line 59): Added
`'Why Fleet'` to the array of excluded page titles in the `v-if`
directive that controls visibility of the right-sidebar swag CTA.

Built for [Mike
McNeil](https://fleetdm.slack.com/archives/D0AFASLRHNU/p1777339712703759)
by [Kilo for Slack](https://kilo.ai/features/slack-integration)

Co-authored-by: kiloconnect[bot] <240665456+kiloconnect[bot]@users.noreply.github.com>

website/views/pages/docs/basic-documentation.ejs

@@ -56,7 +56,7 @@
             <p purpose="subtopics-heading" class="font-weight-bold" v-if="!_.isEmpty(subtopics)">On this page:</p>
             <div purpose="subtopics" v-if="!_.isEmpty(subtopics)">
               <a purpose="subtopic-link" v-for="(subtopic, index) in subtopics" :href="subtopic.url">{{subtopic.title}}</a>
-              <div class="d-none d-lg-block" purpose="swag-cta" v-if="showSwagForm && !['REST API', 'Fleet server configuration'].includes(thisPage.title)">
+              <div class="d-none d-lg-block" purpose="swag-cta" v-if="showSwagForm && !['REST API', 'Fleet server configuration', 'Why Fleet'].includes(thisPage.title)">
                 <a class="d-flex align-items-center justify-content-center" @click="clickSwagRequestCTA()">
                   <div class="d-flex flex-column align-items-center">
                   <img style="height: auto; width: 47px; margin-bottom: 8px;" alt="A very nice Fleet branded shirt" src="/images/fleet-shirt-60x55@2x.png">