Update cheatsheets

tldr/linux/cryptsetup-luksformat

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# cryptsetup luksFormat
+
+> Initialize a LUKS partition and the initial key slot (0) with a passphrase or keyfile.
+> Note: this operation overwrites all data on the partition.
+> More information: <https://manned.org/cryptsetup-luksFormat>.
+
+- Initialize a LUKS volume with a passphrase:
+
+`cryptsetup luksFormat {{/dev/sdXY}}`
+
+- Initialize a LUKS volume with a keyfile:
+
+`crypsetup luksFormat {{/dev/sdXY}} {{path/to/keyfile}}`
+
+- Initialize a LUKS volume with a passphrase and set its label:
+
+`cryptsetup luksFormat --label {{label}} {{/dev/sdXY}}`