src: add nvme-passthru-admin-uring to .gitignore

Commit a94b770 ("nvme/067: test io_uring pass through for NVMe
admin queue") introduced a new program nvme-passthru-admin-uring under
/src directory, but omitted it from .gitignore. Add it to .gitignore.

Fixes: a94b770 ("nvme/067: test io_uring pass through for NVMe admin queue")
Reviewed-by: Chaitanya Kulkarni <[email protected]>
Signed-off-by: Shin'ichiro Kawasaki <[email protected]>

Author: kawasaki

src/.gitignore

@@ -13,3 +13,4 @@
 /miniublk
 /nvme-passthrough-meta
 /ioctl-lbmd-query
+/nvme-passthru-admin-uring