Restored application.properties file

Author: ldemarchis

spring-cloud-oci/spring-cloud-oci-samples/spring-cloud-oci-gen-ai-sample/src/main/resources/application.properties

@@ -10,5 +10,6 @@ spring.cloud.oci.genai.embedding.enabled=true
 spring.cloud.oci.genai.embedding.compartment=${OCI_COMPARTMENT_ID}
 spring.cloud.oci.genai.chat.compartment=${OCI_COMPARTMENT_ID}
 
-spring.cloud.oci.genai.chat.onDemandModelId=cohere.command-r-plus-08-2024
-spring.cloud.oci.genai.embedding.onDemandModelId=cohere.embed-v4.0
+spring.cloud.oci.genai.chat.onDemandModelId=${OCI_CHAT_MODEL_ID}
+spring.cloud.oci.genai.embedding.onDemandModelId=${OCI_EMBEDDING_MODEL_ID}
+