fix(tags): add info about Java 21 (#356)

Co-authored-by: Ryan Cao <[email protected]>

tags/macos_arm_java.md

@@ -6,6 +6,7 @@ color: yellow
 On macOS arm64, also known as Apple Silicon (M1, M2, etc.), you will need to install the arm64 version of Java. We recommend using builds from Azul, the links for which can be found below:
 
 - [Java 8](https://www.azul.com/downloads/?version=java-8-lts&os=macos&architecture=arm-64-bit&package=jdk#zulu) or versions ≤ 1.16
-- [Java 17](https://www.azul.com/downloads/?version=java-17-lts&os=macos&architecture=arm-64-bit&package=jdk#zulu) for versions ≥ 1.17
+- [Java 17](https://www.azul.com/downloads/?version=java-17-lts&os=macos&architecture=arm-64-bit&package=jdk#zulu) for versions ≥ 1.17 and ≤ 1.20.4
+- [Java 21](https://www.azul.com/downloads/?version=java-21-lts&os=macos&architecture=arm-64-bit&package=jdk#zulu) for versions ≥ 1.20.5
 
-It is recommended to install both Java 8 and Java 17.
+It is recommended to install Java 8, Java 17, and Java 21.

tags/why_java_8.md

@@ -3,6 +3,6 @@ title: Why does Prism Launcher ask me to change Java version?
 color: orange
 ---
 
-Minecraft versions before 1.17 required Java 8 and have issues with newer Java, while newer versions require Java 17, so you need to change Java version. Some people think Java 8 is very outdated, however, it's actually an LTS, meaning it's still getting updates.
+Minecraft versions before 1.17 required Java 8 and have issues with newer Java, while newer versions require Java 17 or Java 21, so you need to change Java version. Some people think Java 8 is very outdated, however, it's actually an LTS, meaning it's still getting updates.
 
 If one of your mods is weird and requires newer Java, you can bypass this, by going to instance settings-Java and ticking 'Skip java compatibility checks', but be aware of potential issues, such as [random CMEs](https://bugs.mojang.com/browse/MC-149777).