[ML] Fix serialisation of text embedding updates (elastic#85863)

Author: davidkyle

docs/changelog/85863.yaml

@@ -0,0 +1,5 @@
+pr: 85863
+summary: Fix serialisation of text embedding updates
+area: Machine Learning
+type: bug
+issues: []

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/inference/MlInferenceNamedXContentProvider.java

@@ -584,11 +584,7 @@ public List<NamedWriteableRegistry.Entry> getNamedWriteables() {
             )
         );
         namedWriteables.add(
-            new NamedWriteableRegistry.Entry(
-                InferenceConfigUpdate.class,
-                TextEmbeddingConfigUpdate.NAME,
-                TextClassificationConfigUpdate::new
-            )
+            new NamedWriteableRegistry.Entry(InferenceConfigUpdate.class, TextEmbeddingConfigUpdate.NAME, TextEmbeddingConfigUpdate::new)
         );
         namedWriteables.add(
             new NamedWriteableRegistry.Entry(