Fixed blog layout to display post subheading instead of brief.
Fixed blog layout to display post subheading instead of brief.

Signed-off-by: Mikael Zulfigarov <1fcb9933191574c0a92118d08f2b049f180dc230@sysgears.com>

sysgears/grain-theme-clean-blog,sysgears/grain-theme-clean-blog,sysgears/grain-theme-clean-blog,sysgears/grain-theme-clean-blog,sysgears/grain-theme-clean-blog