Fix Neo4jVectorStore max allowed dimension size to 4096

  - The Neo4j "vector-2.0" index provider allows up to 4096 dimensions.
  - Remove upper dimension boundry check

Author: vbartacek

vector-stores/spring-ai-neo4j-store/src/main/java/org/springframework/ai/vectorstore/Neo4jVectorStore.java

@@ -149,8 +149,7 @@ public Builder withDatabaseName(String databaseName) {
 			 */
 			public Builder withEmbeddingDimension(int newEmbeddingDimension) {
 
-				Assert.isTrue(newEmbeddingDimension >= 1 && newEmbeddingDimension <= 2048,
-						"Dimension has to be withing the boundaries 1 and 2048 (inclusively)");
+				Assert.isTrue(newEmbeddingDimension >= 1, "Dimension has to be positive.");
 
 				this.embeddingDimension = newEmbeddingDimension;
 				return this;