Update json_reference.md

Author: joshspicer

_implementors/json_reference.md

@@ -169,7 +169,7 @@ Variables can be referenced in certain string values in `devcontainer.json` in t
 | `${containerWorkspaceFolder}` | Any | The path that the workspaces files can be found in the container. |
 | `${localWorkspaceFolderBasename}` | Any | Name of the local folder that was opened in the `devcontainer.json` supporting service / tool (that contains `.devcontainer/devcontainer.json`). |
 | `${containerWorkspaceFolderBasename}` | Any | Name of the folder where the workspace files can be found in the container. |
-| `${devcontainerId}` | Any | Identifier derived from a set of container labels that uniquely idenity the dev container on a Docker host. It allows Features to refer to an identifier that is unique to the dev container they are installed into and that is stable across rebuilds.<br> The properties supporting it in devcontainer.json are: `name`, `runArgs`, `initializeCommand`, `onCreateCommand`, `updateContentCommand`, `postCreateCommand`, `postStartCommand`, `postAttachCommand`, `workspaceFolder`, `workspaceMount`, `mounts`, `containerEnv`, `remoteEnv`, `containerUser`, `remoteUser`, and `customizations`. |
+| `${devcontainerId}` | Any | Identifier derived from a set of container labels that uniquely identify the dev container on a Docker host. It allows Features to refer to an identifier that is unique to the dev container they are installed into and that is stable across rebuilds.<br> The properties supporting it in devcontainer.json are: `name`, `runArgs`, `initializeCommand`, `onCreateCommand`, `updateContentCommand`, `postCreateCommand`, `postStartCommand`, `postAttachCommand`, `workspaceFolder`, `workspaceMount`, `mounts`, `containerEnv`, `remoteEnv`, `containerUser`, `remoteUser`, and `customizations`. |
 {: .table .table-bordered .table-responsive}
 
 ## <a href="#schema" name="schema" class="anchor"> Schema </a>