L4D2 Tank Warden

Metadata:

• Made the flavor text for the supported version range more distinct

• The pack.mcmeta is up to date with the new format changes (pack_format is now 64 aka 1.21.8 and supported_formats minimum is now 15 aka 1.20, but it still retains all backwards-compatibility)

• Adjusted pack flavor text to include the pack version on the second line, thereby removing it from the zip folder name.

• Pack version now uses a double dot (i.e. 1.0.1) numbering scheme rather than the original single dot (i.e. 1.01) method.

• Uploaded to Modrinth for parity with CurseForge