Update dependency net.neoforged:neoform-runtime to v2.0.18

Author: neoforged-renovate[bot]

src/main/java/net/neoforged/nfrtgradle/NeoFormRuntimeExtension.java

@@ -12,7 +12,7 @@
 public abstract class NeoFormRuntimeExtension {
     public static final String NAME = "neoFormRuntime";
 
-    private static final String DEFAULT_NFRT_VERSION = "2.0.17";
+    private static final String DEFAULT_NFRT_VERSION = "2.0.18";
 
     @Inject
     public NeoFormRuntimeExtension(Project project) {