Issue Description: Skins don't update in the map when the player's skin is changed.

• Dynmap Version: 3.2.1
• Server Version: 1.16.5 paper
• Pastebin of Configuration.txt: too hard to copy-paste. I can get it if it is important
• Server Host (if applicable): Contabo? (Justa plain hosting service not intended for only games)
• Pastebin of crashlogs or other relevant logs: No logs
• Other Relevant Data/Screenshots: I'm using this texture pack and these plugins and my map is from alpha .8
• Steps to Replicate: (Unsure of the steps)

• Have full-body user icons on (Unsure if it is part of the problem)
• Go on the server
• render (Unsure if it is part of the problem)
• leave and change skin
• go back on the server
• check dynmap and the player skin is the old one

[x] I have looked at all other issues and this is not a duplicate
[-] I have been able to replicate this (Unable to fix and therefore unable to replicate)

The pic in the link looks like a skin, what's the issue?

Weird that it updated so late even though I had restarted the server multiple times.

https://minotar.net/armor/bust/erland_2/100.png I tried using a different service for skins but it also failed

You will need to enable fetchskins: true in the config in order for skins to be updated

Did it and changed the URL to default but now my profile pic looks like this: http://play.erland.fi:8123/tiles/faces/32x32/Erland_2.png

Here is the configuration.txt's skin part btw

ctm-support: true
# custom-colors-support: if true, Custom Colors in texture packs is enabled (default)
custom-colors-support: true

# Control loading of player faces (if set to false, skins are never fetched)
fetchskins: true

# Control updating of player faces, once loaded (if faces are being managed by other apps or manually)
refreshskins: true

# Customize URL used for fetching player skins (%player% is macro for name)
skin-url: "http://skins.minecraft.net/MinecraftSkins/%player%.png"
#skin-url: "https://minotar.net/avatar/%player%"
#skin-url: "https://minotar.net/armor/bust/%player%/100.png"

# Enable skins via SkinsRestorer plugin instead of internal legacy implementation (disabled by default)
#skinsrestorer-integration: true