feat: Update organization docs with more answers (#2134)

Clarify the organization account conversion flow by explaining the
impact of naming on display name vs. username, and details about the
auto-created personal owner account.

---
[Slack
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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Clarifies org conversion naming behavior, preserves URLs/usernames,
and documents the auto-created personal owner account.
> 
> - **Docs**:
> - Update
`sources/platform/collaboration/organization_account/index.md`:
>     - Clarify conversion step wording (enter org name).
> - Add note explaining that the org name is display-only, original
`username` and public URLs remain unchanged, and a new personal owner
account is auto-created with a derived username to manage the
organization.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
5c71ef7. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

---------

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Michał Olender <92638966+TC-MO@users.noreply.github.com>

Author: 3 people

sources/platform/collaboration/organization_account/index.md

@@ -48,9 +48,11 @@ Then, under the **Organizations** [tab](https://console.apify.com/account#/myorg
 
 ![Convert your account to an organization](../images/organizations/convert-to-organization.png)
 
-Next, set the organization's name and click **Convert**.
+Next, enter an organization name and select **Convert**.
 
-And that's it! Your personal account becomes the organization, and you will be logged out automatically. You can now log into your new personal account with the same credentials as you are currently logged in with. This applies to both **password** and **OAuth** methods.
+The name you enter becomes the organization's display name. The original account **username** stays the same, so any public Actors or API references (for example, `my_profile/my_actor`) keep their existing URLs. A new personal account is created for you with the same login credentials and a username based on your original username with `-owner` added (for example, `my_profile-owner`). This applies to both **password** and **OAuth** methods. You'll use this new personal account to manage and own the organization.
+
+And that's it! Your personal account becomes the organization, and you will be logged out automatically.
 
 For information on [adding members and assigning roles](./setup.md), see the Setup page.