Update version to 1.21.8

Author: Lauriichan

pom.xml

@@ -13,7 +13,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <java.package.id>smoothtimber</java.package.id>
         <project.roaster.version>2.28.0.Final</project.roaster.version>
-        <server.version>1.21.4-R0.1-SNAPSHOT</server.version>
+        <server.version>1.21.8-R0.1-SNAPSHOT</server.version>
     </properties>
 
     <build>

src/main/java/com/syntaxphoenix/spigot/smoothtimber/version/changer/v1_21xChanger.java

@@ -23,7 +23,10 @@
 @SupportedVersions({
     "1.21.3",
     "1.21.4",
-    "1.21.5"
+    "1.21.5",
+    "1.21.6",
+    "1.21.7",
+    "1.21.8"
 })
 public final class v1_21xChanger implements VersionChanger {