docs: opt out: add date we switched Bluesky to deactivate, other tweaks

templates/docs.html

@@ -238,9 +238,10 @@ <h3 id="about">About</h3>
 <li id="opt-out" class="question">How do I opt out and remove my site or account?</li>
 <li class="answer">
 <p>If you're on the fediverse or Bluesky, and you've opted in but now want to opt out, block the Bridgy Fed bot user for the network you want to opt out of. For example, on the fediverse, block <code>@[email protected]</code>. On Bluesky, block <a href="https://bsky.app/profile/ap.brid.gy">@ap.brid.gy</a>.</p>
+<p>If you're on the web, feel free to <a href="mailto:[email protected]">email me</a>, or you can put the text <code>#nobridge</code> in the <a href="#web-profile">profile on your home page</a> and then <a href="#update-profile">update your profile</a> on <a href="#user-page">your user page</a>.</p>
 <p>Once you've done this, Bridgy Fed will delete your bridged profile in that network, and it will no longer bridge any of your posts or interactions there.</p>
 <p>You can undo this later by un-blocking and re-following the bot user, but depending on the network, not everything will be perfectly restored. For example, when you disable bridging into the fediverse, the bridged fediverse account is deleted and all followers are disconnected. If you later re-enable it, fediverse users will have to search for your account by address manually to find and follow it again.</p>
-<p>If you're on the web, feel free to <a href="mailto:[email protected]">email me</a>, or you can put the text <code>#nobridge</code> in the <a href="#web-profile">profile on your home page</a> and then <a href="#update-profile">update your profile</a> on <a href="#user-page">your user page</a>.</p>
+<p>(For accounts bridged into Bluesky, you can only undo opting out if you first blocked the bot user after 2024-10-22. Before that date, we disabled Bluesky accounts <a href="https://github.com/snarfed/bridgy-fed/issues/1130#issuecomment-2229901486">with a different technique that can't yet be undone</a>.)
 </li>
 
 <li id="dms" class="question">Why is Bridgy Fed chatting or DMing with me?</li>