Fix spelling/wording issues

Found by using:
    codespell --builtin clear,rare,usage,informal,code,names

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/README b/README
index 94bc164..f7a5037 100644
--- a/README
+++ b/README
@@ -834,7 +834,7 @@ Xorg mailing list:
 
         https://lists.freedesktop.org/mailman/listinfo/xorg
 
-The master development code repository can be found at:
+The primary development code repository can be found at:
 
         https://gitlab.freedesktop.org/xorg/driver/xf86-video-mach64