Merge branch 'docs/fix-lock-emoji' into 'master'

docs: fix readme lock emoji

See merge request to-be-continuous/docker!7

README.md

@@ -104,7 +104,7 @@ If you use **different registries** for snapshot and release images, you shall u
 | Name                                     | description                            |
 | ---------------------------------------- | -------------------------------------- |
 | :lock: `DOCKER_REGISTRY_SNAPSHOT_USER`   | Docker registry username for snapshot image registry |
-| :lock `DOCKER_REGISTRY_SNAPSHOT_PASSWORD`| Docker registry password for snapshot image registry |
+| :lock: `DOCKER_REGISTRY_SNAPSHOT_PASSWORD`| Docker registry password for snapshot image registry |
 | :lock: `DOCKER_REGISTRY_RELEASE_USER`    | Docker registry username for release image registry |
 | :lock: `DOCKER_REGISTRY_RELEASE_PASSWORD`| Docker registry password for release image registry |