Added ability to adjust priority to the mail message (#66) (#67)

* Added ability to adjust priority to the mail message (#66)

Co-authored-by: John Pastore <cbbm142@github.com>
Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>

.github/workflows/test.yml

@@ -55,3 +55,4 @@ jobs:
           from: github-actions
           attachments: ${{matrix.attachments}}
           convert_markdown: ${{matrix.convert_markdown}}
+          priority: high