fix: improve default_prompt (k8sgpt-ai#406)

* fix: improve default_prompt

Signed-off-by: Camilo Giraldo <camigira@gmail.com>

* fix: specific instructions for prompt output

Signed-off-by: Camilo Giraldo <camigira@gmail.com>

---------

Signed-off-by: Camilo Giraldo <camigira@gmail.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>

pkg/ai/prompts.go

@@ -1,5 +1,9 @@
 package ai
 
 const (
-	default_prompt = "Simplify the following Kubernetes error message and provide a solution in %s: %s"
+	default_prompt = `Simplify the following Kubernetes error message delimited by triple dashes written in --- %s --- language; --- %s ---.
+	Provide the most possible solution in a step by step style in no more than 280 characters. Write the output in the following format:
+	Error: {Explain error here}
+	Solution: {Step by step solution here}
+	`
 )