Use spigot-api 1.20.4

pom.xml

@@ -67,7 +67,7 @@
         <maven.minimumVersion>3.6.3</maven.minimumVersion>
 
         <!-- Dependencies versions -->
-        <spigot.version>1.20.2-R0.1-SNAPSHOT</spigot.version>
+        <spigot.version>1.20.4-R0.1-SNAPSHOT</spigot.version>
 
         <!-- Versioning properties -->
         <project.outputName>AuthMe</project.outputName>

src/main/java/fr/xephi/authme/service/BukkitService.java

@@ -117,6 +117,10 @@ public class BukkitService implements SettingsDependent {
         }
     }
 
+    /**
+     * Runs the task synchronously if we are running Folia, else do nothing but run it.
+     * @param task the task to be run
+     */
     public void runTaskIfFolia(Entity entity, Runnable task) {
         if (IS_FOLIA) {
             runTask(entity, task);
@@ -125,6 +129,10 @@ public class BukkitService implements SettingsDependent {
         }
     }
 
+    /**
+     * Runs the task synchronously if we are running Folia, else do nothing but run it.
+     * @param task the task to be run
+     */
     public void runTaskIfFolia(Location location, Runnable task) {
         if (IS_FOLIA) {
             runTask(location, task);