docs: Updated java.md

Signed-off-by: Anush008 <anushshetty90@gmail.com>

qdrant-landing/content/documentation/headless/snippets/update-collection/disable-quantization/csharp.md

@@ -5,7 +5,7 @@ using Qdrant.Client.Grpc;
 var client = new QdrantClient("localhost", 6334);
 
 await client.UpdateCollectionAsync(
-	collectionName: "my_collection",
+	collectionName: {collection_name}",
 	quantizationConfig: new QuantizationConfigDiff { Disabled = new Disabled() }
 );
 ```

qdrant-landing/content/documentation/headless/snippets/update-collection/disable-quantization/java.md

@@ -1,4 +1,5 @@
 ```java
+import io.qdrant.client.grpc.Collections.Disabled;
 import io.qdrant.client.grpc.Collections.QuantizationConfigDiff;
 import io.qdrant.client.grpc.Collections.UpdateCollection;
 
@@ -6,6 +7,8 @@ client.updateCollectionAsync(
     UpdateCollection.newBuilder()
         .setCollectionName("{collection_name}")
         .setQuantizationConfig(
-            QuantizationConfigDiff.newBuilder().disabled().build()) // WRONG
+            QuantizationConfigDiff.newBuilder()
+                .setDisabled(Disabled.getDefaultInstance())
+                .build())
         .build());
 ```