pkg: fix codespell issues

pkg/api/metrics.go

@@ -75,7 +75,7 @@ func GetTestDataScenarios(c *m.ReqContext) Response {
 	return JSON(200, &result)
 }
 
-// Genereates a index out of range error
+// Generates a index out of range error
 func GenerateError(c *m.ReqContext) Response {
 	var array []string
 	return JSON(200, array[20])

pkg/api/static/static.go

@@ -48,7 +48,7 @@ type StaticOptions struct {
 	// Expires defines which user-defined function to use for producing a HTTP Expires Header
 	// https://developers.google.com/speed/docs/insights/LeverageBrowserCaching
 	AddHeaders func(ctx *macaron.Context)
-	// FileSystem is the interface for supporting any implmentation of file system.
+	// FileSystem is the interface for supporting any implementation of file system.
 	FileSystem http.FileSystem
 }