Update service_create.md
Typo in word propagation.
@@ -425,7 +425,7 @@ The following options can only be used for bind mounts (`type=bind`):
Bind propagation refers to whether or not mounts created within a given
bind mount or named volume can be propagated to replicas of that mount. Consider
-a mount point `/mnt`, which is also mounted on `/tmp`. The propation settings
+a mount point `/mnt`, which is also mounted on `/tmp`. The propagation settings
control whether a mount on `/tmp/a` would also be available on `/mnt/a`. Each
propagation setting has a recursive counterpoint. In the case of recursion,
consider that `/tmp/a` is also mounted as `/foo`. The propagation settings
