web: convert changelogs from old format

https://gist.github.com/dumbmoron/3fc6c0c747d791928aba939976fd9304

web/changelogs/7.3.md

@@ -0,0 +1,30 @@
+---
+title: "extended video length limit, metadata toggle, ui improvements, and more!"
+date: "September 6, 2023"
+banner:
+    file: "meowthsnap.webp"
+    alt: "cartoon meowth pointing paw dramatically and saying something"
+---
+this update gives cobalt a sharp look in chromium browsers and makes it even more useful than before. check out the full changelog below!
+
+service improvements:
+- increased video length limit from 3 hours to 5 hours. feel free to download lectures you need :)
+- you can now disable file metadata in settings.
+- fixed a bug which previously caused some downloads to end up being 0 bytes.
+
+ui improvements:
+- fixed clickable area for urgent notice (text on top).
+- fixed blurry header in chrome.
+- fixed blurry tab bar in chrome.
+- fixed blurry switches in chrome.
+- fixed weirdly rounded corners in popups.
+- fixed 1px gap on edges of various elements in popup in chrome.
+- fixed overscrolling in other settings tab on ios.
+- fixed unexpected button highlight effect on phones.
+- removed outdated fixes for tiny screens.
+
+other improvements:
+- cobalt web & api start faster than before, additional preparation functions aren't unexpectedly run anymore.
+- cobalt is now available as a docker package. check it out on <a class="text-backdrop link" href="https://github.com/imputnet/cobalt/pkgs/container/cobalt" target="_blank">github</a>.
+
+thank you for being here. i hope you have a great day :D