feat: support minecraft 1.21.6

[0utplay]

Motivation

Minecraft 1.21.6 was released and we should support it.

Modification

Updated the downloads for related platforms and updated the fabric related code.

Result

Minecraft 1.21.6 is supported.

[github-actions]

Test Results

 56 files  ±0   56 suites  ±0   2m 37s ⏱️ +11s
566 tests ±0  566 ✅ ±0  0 💤 ±0  0 ❌ ±0 
931 runs  ±0  931 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 0556ba7. ± Comparison against base commit 5ab4a6f.

This pull request removes 37 and adds 37 tests. Note that renamed tests count towards both.

eu.cloudnetservice.driver.impl.document.DocumentSerialisationTest ‑ [4] {"b":1,"s":2,"i":3,"l":4,"f":5.0,"d":6.0,"c":"/","string":"Hello, World!","bol":true,"cloud":["Ben?","Yes","No","HoHoHoHo"],"world":{"this":"is","hello":"world","insane":"!"}}, PRETTY
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [14] 2025-06-18
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [23] 08:40:00.270044652
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [28] 08:40:00.270171408Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [29] 08:40:00.270196305Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [30] 08:40:00.270219688+05:00
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [31] 08:40:00.270241990-03:00
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [34] 2025-06-18T08:40:00.270397529
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [39] 2025-06-18T08:40:00.270590559Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [4] 2025-06-18T08:40:00.263884845Z
…

eu.cloudnetservice.driver.impl.document.DocumentSerialisationTest ‑ [4] {"b":1,"s":2,"i":3,"l":4,"f":5.0,"d":6.0,"c":"/","string":"Hello, World!","bol":true,"cloud":["Ben?","Yes","No","HoHoHoHo"],"world":{"this":"is","insane":"!","hello":"world"}}, PRETTY
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [14] 2025-06-24
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [23] 06:55:23.414604269
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [28] 06:55:23.414708683Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [29] 06:55:23.414729972Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [30] 06:55:23.414752274+05:00
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [31] 06:55:23.414770759-03:00
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [34] 2025-06-24T06:55:23.415392536
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [39] 2025-06-24T06:55:23.415551632Z
eu.cloudnetservice.driver.impl.document.gson.JavaTimeSerializerTest ‑ [4] 2025-06-24T06:55:23.407955299Z
…

♻️ This comment has been updated with latest results.