Convert JPG images to PNG

Minecraft 1.20.3 no longer supports loading JPG images.

src/main/java/com/replaymod/core/utils/Utils.java

@@ -80,7 +80,7 @@ public class Utils {
     static {
         Image thumbnail;
         try {
-            thumbnail = Image.read(getResourceAsStream("/default_thumb.jpg"));
+            thumbnail = Image.read(getResourceAsStream("/default_thumb.png"));
         } catch (Exception e) {
             thumbnail = new Image(1, 1);
             e.printStackTrace();

src/main/java/com/replaymod/render/gui/GuiVideoRenderer.java

@@ -28,7 +28,7 @@ import net.minecraft.client.texture.NativeImage;
 import java.nio.ByteBuffer;
 
 public class GuiVideoRenderer extends GuiScreen implements Tickable {
-    private static final Identifier NO_PREVIEW_TEXTURE = new Identifier("replaymod", "logo.jpg");
+    private static final Identifier NO_PREVIEW_TEXTURE = new Identifier("replaymod", "logo.png");
 
     private final VideoRenderer renderer;