Fix #4900: 修复 ManagedProcess#getLines 完成后不会解除锁定的问题 (#4913)

HMCLCore/src/main/java/org/jackhuang/hmcl/util/platform/ManagedProcess.java

@@ -113,7 +113,7 @@ public final class ManagedProcess {
      */
     public List<String> getLines(Predicate<String> lineFilter) {
         lock.lock();
-
+        try {
             if (lineFilter == null)
                 return List.copyOf(lines);
 
@@ -123,6 +123,9 @@ public final class ManagedProcess {
                     res.add(line);
             }
             return Collections.unmodifiableList(res);
+        } finally {
+            lock.unlock();
+        }
     }
 
     public void addLine(String line) {