docs: fix required_variables typo in ChatPromptBuilder guide (#11698)

Author: ErenAta16

docs-website/docs/pipeline-components/builders/chatpromptbuilder.mdx

@@ -56,7 +56,7 @@ result = builder.run(
 
 ### Variables
 
-The template variables found in the init template are used as input types for the component. If there are no `required_vairables` set, all variables are considered optional by default. In this case, any missing variables are replaced with empty strings, which can lead to unintended behavior, especially in complex pipelines.
+The template variables found in the init template are used as input types for the component. If there are no `required_variables` set, all variables are considered optional by default. In this case, any missing variables are replaced with empty strings, which can lead to unintended behavior, especially in complex pipelines.
 
 Use `required_variables` and `variables` to specify the input types and required variables:
 

docs-website/versioned_docs/version-2.30/pipeline-components/builders/chatpromptbuilder.mdx

@@ -56,7 +56,7 @@ result = builder.run(
 
 ### Variables
 
-The template variables found in the init template are used as input types for the component. If there are no `required_vairables` set, all variables are considered optional by default. In this case, any missing variables are replaced with empty strings, which can lead to unintended behavior, especially in complex pipelines.
+The template variables found in the init template are used as input types for the component. If there are no `required_variables` set, all variables are considered optional by default. In this case, any missing variables are replaced with empty strings, which can lead to unintended behavior, especially in complex pipelines.
 
 Use `required_variables` and `variables` to specify the input types and required variables: