Fix: 修复一些 typo (#4202)

HMCLCore/src/main/java/org/jackhuang/hmcl/download/MaintainTask.java

@@ -177,7 +177,7 @@ public class MaintainTask extends Task<Version> {
         String[] ignores = ignoreList.split(",");
         List<String> newIgnoreList = new ArrayList<>();
 
-        // To resolve the the problem that name of primary jar may conflict with the module naming convention,
+        // To resolve the problem that name of primary jar may conflict with the module naming convention,
         // we need to manually ignore ${primary_jar}.
         newIgnoreList.add("${primary_jar}");
 

HMCLCore/src/main/java/org/jackhuang/hmcl/event/Event.java

@@ -84,7 +84,7 @@ public class Event {
     }
 
     /**
-     * true if this Event this cancelable.
+     * true if this Event is cancelable.
      */
     public boolean isCancelable() {
         return false;