Update cheatsheets

tldr/linux/qm-disk

@@ -23,3 +23,15 @@ source: https://github.com/tldr-pages/tldr.git
 - Import a VMDK/`.qcow2`/raw disk image using a specific storage name:
 
 `qm {{[di|disk]}} {{[i|import]}} {{vm_id}} {{path/to/disk}} {{storage_name}} --format {{qcow2|raw|vmdk}}`
+
+- Rescan all storages and update disk sizes and unused disk images:
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+`qm {{[di|disk]}} {{[resc|rescan]}}`
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+- Perform a dry-run of a rescan and do not write any changes to configurations:
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+`qm {{[di|disk]}} {{[resc|rescan]}} --dryrun`
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+- Specify a virtual machine by its ID:
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+`qm {{[di|disk]}} {{[resc|rescan]}} --vmid {{100}}`