Fix typo - stacks being managed, not tasks?
@@ -77,7 +77,7 @@ axqh55ipl40h vossibility-stack_vossibility-collector 1 icecrime/vossibility-co
## Managing stacks
-Tasks are managed using the `docker stack` command:
+Stacks are managed using the `docker stack` command:
```bash
# docker stack --help
