Added 1.21.8/1.21.7 (#19)

Added the newer versions

Author: Wouze

docs/getting-started.md

@@ -11,6 +11,8 @@ The latest version of the release export for a particular Minecraft version can
 
 | Minecraft Version |                                                                                                                            Mappings Version                                                                                                                            |
 |:-----------------:|:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:|
+|    **1.21.8**     | ![Latest release version badge for 1.21.8](https://img.shields.io/maven-metadata/v?color=forestgreen&label=release&metadataUrl=https%3A%2F%2Fldtteam.jfrog.io%2Fartifactory%2Fparchmentmc-internal%2Forg%2Fparchmentmc%2Fdata%2Fparchment-1.21.8%2Fmaven-metadata.xml) |
+|    **1.21.7**     | ![Latest release version badge for 1.21.7](https://img.shields.io/maven-metadata/v?color=forestgreen&label=release&metadataUrl=https%3A%2F%2Fldtteam.jfrog.io%2Fartifactory%2Fparchmentmc-internal%2Forg%2Fparchmentmc%2Fdata%2Fparchment-1.21.7%2Fmaven-metadata.xml) |
 |    **1.21.6**     | ![Latest release version badge for 1.21.6](https://img.shields.io/maven-metadata/v?color=forestgreen&label=release&metadataUrl=https%3A%2F%2Fldtteam.jfrog.io%2Fartifactory%2Fparchmentmc-internal%2Forg%2Fparchmentmc%2Fdata%2Fparchment-1.21.6%2Fmaven-metadata.xml) |
 |    **1.21.5**     | ![Latest release version badge for 1.21.5](https://img.shields.io/maven-metadata/v?color=forestgreen&label=release&metadataUrl=https%3A%2F%2Fldtteam.jfrog.io%2Fartifactory%2Fparchmentmc-internal%2Forg%2Fparchmentmc%2Fdata%2Fparchment-1.21.5%2Fmaven-metadata.xml) |
 |    **1.21.4**     | ![Latest release version badge for 1.21.4](https://img.shields.io/maven-metadata/v?color=forestgreen&label=release&metadataUrl=https%3A%2F%2Fldtteam.jfrog.io%2Fartifactory%2Fparchmentmc-internal%2Forg%2Fparchmentmc%2Fdata%2Fparchment-1.21.4%2Fmaven-metadata.xml) |