Update cheatsheets

tldr/linux/koji-cancel

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# koji cancel
+
+> Cancel active tasks running on the Koji build system.
+> More information: <https://docs.pagure.org/koji/>.
+
+- Cancel a task by its ID:
+
+`koji cancel {{task_id}}`
+
+- Cancel multiple tasks:
+
+`koji cancel {{task_id1 task_id2 ...}}`
+
+- Cancel a task with verbose output:
+
+`koji cancel --verbose {{task_id}}`
+
+- Display help:
+
+`koji cancel {{[-h|--help]}}`