app-misc/tmux: Add rrangel to OWNERS

I use this package so I'll take ownership.

BUG=b:218726233
TEST=none

Change-Id: I4d96c2bb4e2cc37870128bdb513e748fece89135
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3453147
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Auto-Submit: Raul Rangel <rrangel@chromium.org>
Commit-Queue: Raul Rangel <rrangel@chromium.org>
Tested-by: Raul Rangel <rrangel@chromium.org>
diff --git a/app-misc/tmux/OWNERS b/app-misc/tmux/OWNERS
new file mode 100644
index 0000000..db64b04
--- /dev/null
+++ b/app-misc/tmux/OWNERS
@@ -0,0 +1 @@
+rrangel@chromium.org