Agent's Pack of Coolness

• Updated mods
• Updated Minecraft version to 1.21.1.

Due to instabilities or incompatibilities, the mods CIT Resewn, LambDynamicLights, OldInventorism, and ScreenshotToClipboard are not included in this release.

Another note: the packs Programmer Art: Blurred Background and No New Music have been left out of this release, partially due to a warning from moderators about distributing vanilla resources, and partially from laziness on my part.