Update PULL_REQUEST_TEMPLATE.md
Update PULL_REQUEST_TEMPLATE.md

Fix hyperlink
mehmetf/plugins,mehmetf/plugins,flutter/plugins,mehmetf/plugins,flutter/plugins,flutter/plugins,tvolkert/plugins,mehmetf/plugins,tvolkert/plugins,tvolkert/plugins,flutter/plugins,flutter/plugins,flutter/plugins,flutter/plugins,mehmetf/plugins,flutter/plugins,tvolkert/plugins