Docs update from nexus-sdk (#70)

* Update docs from nexus-sdk (commit: 4bd3dce949570d8278e84d5551083c48722db03e)

* undo broken link

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Co-authored-by: loverdos <[email protected]>
Co-authored-by: Thomas Dekeyser <[email protected]>

Author: 3 people

nexus-sdk/cli.md

@@ -174,6 +174,12 @@ Create a new Nexus network and assign `count-leader-caps` (default: 5) leader ca
 
 The network object ID is returned.
 
+---
+
+### `nexus completion`
+
+Provides completion for some well-known shells.
+
 <!-- List of References -->
 
 [nexus-cli-repo]: https://github.com/Talus-Network/nexus-sdk/tree/main/cli