Fix to the hero so you can have the image named anything you want (#248)

* Fix to the hero so you can have the image named anything you want

* Keep backward compatibility

Signed-off-by: hossainemruz <hossainemruz@gmail.com>

Co-authored-by: hossainemruz <hossainemruz@gmail.com>

layouts/partials/helpers/get-hero.html

@@ -1,5 +1,10 @@
 {{/* check if there is any hero image in the same folder as the markdown file */}}
 {{ $heroImage := .Page.Resources.GetMatch "hero.{jpg,png,svg}"}}
+
+{{/*  if hero image is specified in the page front-matter, then use that  */}}
+{{ if .Params.hero }}
+  {{ $heroImage = .Page.Resources.GetMatch .Params.hero }}
+{{ end }}
 {{ .Scratch.Set "heroScratch" $heroImage }}
 
 {{/* if hero image is not provided, then use the default hero image */}}