stage2/ml9: move where file is moved and change temp file name

this should reduce issues where the file system may prevent the file move from happening. F.ex. cross file systems, or file being open due to the stream.

Author: Sychic

stage2/modlauncher9/src/main/java/gg/essential/loader/stage2/DedicatedJarLoader.java

@@ -36,7 +36,7 @@ protected static void downloadDedicatedJar(LoaderUI ui, Path modsDir, String gam
         ui.setDownloadSize(connection.getContentLength());
 
         final Path target = modsDir.resolve(String.format("Essential %s (%s).jar", essentialVersion, gameVersion));
-        final Path tempFile = Files.createTempFile("Dedicated Essential jar", "");
+        final Path tempFile = Files.createFile(modsDir.resolve("Essential Jar Download.jar.tmp"));
 
         try (
                 final InputStream in = connection.getInputStream();
@@ -50,10 +50,12 @@ protected static void downloadDedicatedJar(LoaderUI ui, Path modsDir, String gam
                 totalRead += read;
                 ui.setDownloaded(totalRead);
             }
-
-            Files.move(tempFile, target, ATOMIC_MOVE);
         } finally {
-            Files.deleteIfExists(tempFile);
+            try {
+                Files.move(tempFile, target, ATOMIC_MOVE);
+            } finally {
+                Files.deleteIfExists(tempFile);
+            }
         }
     }