chore: fix typo (#15)

Author: rdhar

README.md

@@ -90,7 +90,7 @@ jobs:
           user-prompt: Troubleshoot the following Terraform output; ${{ steps.provision.outputs.result }}
           max-tokens: 500
           temperature: 0.7
-          top_p: 0.9
+          top-p: 0.9
 ```
 
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