web: timeline: add space between Discord and or

Add a space between the Discord link and the next word "or". This only
shows up on the timeline if you are not logged in...meaning it's one of
the first things a new user sees.

appview/pages/templates/timeline.html

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     tightly-knit social coding, <a href="/login" class="underline inline-flex gap-1 items-center">join now {{ i "arrow-right" "w-4 h-4" }}</a>
-    <p class="pt-5 px-10 text-sm text-gray-500 dark:text-gray-400">Join our <a href="https://chat.tangled.sh">Discord</a>or IRC channel: <a href="https://web.libera.chat/#tangled"><code>#tangled</code> on Libera Chat</a>.
+    <p class="pt-5 px-10 text-sm text-gray-500 dark:text-gray-400">Join our <a href="https://chat.tangled.sh">Discord</a> or IRC channel: <a href="https://web.libera.chat/#tangled"><code>#tangled</code> on Libera Chat</a>.
     Read an introduction to Tangled <a href="https://blog.tangled.sh/intro">here</a>.</p>
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