Fix mistake in README.md

README.md

@@ -145,7 +145,7 @@ environments.
 Here's an example configuration file:
 
 ```toml
-default_backend = "openai"   # Default backend when one is not selected
+default_backend = "official_openai"   # Default backend when one is not selected
 
 [backends.official_openai]
 type = "openai"
@@ -187,7 +187,7 @@ line, or as a Go library.
 Before starting to generate code, you can list all models available in a
 backend:
 
-    aiac -b aws_prof --list-models
+    aiac -b aws_prod --list-models
 
 This will return a list of all available models. Note that depending on the LLM
 provider, this may list models that aren't accessible or enabled for the
@@ -205,7 +205,7 @@ This will use the default backend in the configuration file and the default
 model for that backend, assuming they are indeed defined. To use a specific
 backend, provide the `--backend` or `-b` flag:
 
-    aiac -b aws_prof terraform for AWS EC2
+    aiac -b aws_prod terraform for AWS EC2
 
 To use a specific model, provide the `--model` or `-m` flag: