README.md: Correct leading ====== for title
README.md: Correct leading ====== for title

The ====== prior to the title is not interpretted correctly and appears
in the rendered version. Remove it, relying on the ===== directly under
the title instead.

Signed-off-by: Darren Hart (VMware) <38f9eaa30910c40b06f5a60020b1222f2a953801@infradead.org>

dvhart/gedit-git-plugin