Update cheatsheets

pyats

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pyATS
+
+> A vendor agnostic test automation framework by Cisco Systems, used for network and systems testing.
+> More information: <https://developer.cisco.com/pyats/>.
+
+- Run a `pyATS` subcommand:
+
+`pyats {{subcommand}}`
+
+- Display help:
+
+`pyats --help`
+
+- Display help about a specific subcommand:
+
+`pyats {{subcommand}} --help`
+
+- Display version:
+
+`pyats version check`