qm*: add missing alias pages (#17515)

pages/linux/qm-agent.md

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+# qm agent
+
+> This command is an alias of `qm guest cmd`.
+
+- View documentation for the original command:
+
+`tldr qm guest cmd`

pages/linux/qm-disk-rescan.md

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+# qm disk rescan
+
+> Rescan all storages and update disk sizes and unused disk images of a virtual machine.
+> More information: <https://pve.proxmox.com/pve-docs/qm.1.html>.
+
+- Rescan all storages and update disk sizes and unused disk images of a specific virtual machine:
+
+`qm disk rescan {{vm_id}}`
+
+- Perform a dry-run of rescan on a specific virtual machine and do not write any changes to configurations:
+
+`qm disk rescan --dryrun {{true}} {{vm_id}}`

pages/linux/qm-rescan.md

@@ -1,12 +1,7 @@
 # qm rescan
 
-> Rescan all storages and update disk sizes and unused disk images of a virtual machine.
-> More information: <https://pve.proxmox.com/pve-docs/qm.1.html>.
+> This command is an alias of `qm disk rescan`.
 
-- Rescan all storages and update disk sizes and unused disk images of a specific virtual machine:
+- View documentation for the original command:
 
-`qm rescan {{vm_id}}`
-
-- Perform a dry-run of rescan on a specific virtual machine and do not write any changes to configurations:
-
-`qm rescan --dryrun {{true}} {{vm_id}}`
+`tldr qm disk rescan`

pages/linux/qm-unlink.md

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+# qm unlink
+
+> This command is an alias of `qm disk unlink`.
+
+- View documentation for the original command:
+
+`tldr qm disk unlink`