Update cheatsheets

tldr/linux/aa-decode

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# aa-decode
+
+> Decode AppArmor audit logs into a human-readable format.
+> More information: <https://gitlab.com/apparmor/apparmor/-/wikis/manpage_aa-decode.8>.
+
+- Decode a hex string:
+
+`aa-decode {{hexstring}}`
+
+- Decode a log file:
+
+`sudo aa-decode {{logfile}}`
+
+- Decode logs from standard input (e.g., redirected file):
+
+`sudo aa-decode - < {{logfile}}`
+
+- Display help:
+
+`aa-decode {{[-h|--help]}}`