Prevent async task pool from being full (#2894)

Fixes #2883

core/src/main/java/org/geysermc/geyser/skin/SkinProvider.java

@@ -601,6 +601,8 @@ public class SkinProvider {
 
         HttpURLConnection con = (HttpURLConnection) new URL(imageUrl).openConnection();
         con.setRequestProperty("User-Agent", "Geyser-" + GeyserImpl.getInstance().getPlatformType().toString() + "/" + GeyserImpl.VERSION);
+        con.setConnectTimeout(10000);
+        con.setReadTimeout(10000);
 
         BufferedImage image = ImageIO.read(con.getInputStream());
         if (image == null) throw new NullPointerException();

core/src/main/java/org/geysermc/geyser/util/WebUtils.java

@@ -52,6 +52,8 @@ public class WebUtils {
             HttpURLConnection con = (HttpURLConnection) url.openConnection();
             con.setRequestMethod("GET");
             con.setRequestProperty("User-Agent", "Geyser-" + GeyserImpl.getInstance().getPlatformType().toString() + "/" + GeyserImpl.VERSION); // Otherwise Java 8 fails on checking updates
+            con.setConnectTimeout(10000);
+            con.setReadTimeout(10000);
 
             return connectionToString(con);
         } catch (Exception e) {