[FFmpeg-cvslog] INSTALL.md: Fix Markdown formatting

[Justin Bull]

ffmpeg | branch: master | Justin Bull <me at justinbull.ca> | Thu Jan 31 11:46:49 2019 -0500| [22fc9cdd7e2e7f2d46d992086c6566d01dd14aef] | committer: Lou Logan

INSTALL.md: Fix Markdown formatting

Signed-off-by: Lou Logan <lou at lrcd.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=22fc9cdd7e2e7f2d46d992086c6566d01dd14aef
---

 INSTALL.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/INSTALL.md b/INSTALL.md
index 5db912231c..3b220bc6ff 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -1,4 +1,4 @@
-#Installing FFmpeg:
+## Installing FFmpeg
 
 1. Type `./configure` to create the configuration. A list of configure
 options is printed by running `configure --help`.