docs: update prompts.md

faciliate -> facilitate

docs/prompts.md

@@ -43,7 +43,7 @@ generate({
 ```
 
 One shortcoming of defining prompts in your code is that testing requires executing
-them as part of a flow. To faciliate more rapid iteration, Genkit provides a facility
+them as part of a flow. To facilitate more rapid iteration, Genkit provides a facility
 to define your prompts and run them in the Developer UI.
 
 Use the `definePrompt` function to register your prompts with Genkit.