Update cheatsheets

tldr/regedit

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# regedit
+
+> Wine registry counterpart of the Microsoft Windows `regedit` service.
+> More information: <https://manned.org/regedit>.
+
+- Export a specific registry key and contents to a file:
+
+`regedit -E {{path/to/file}} {{path/to/registry_key}}`
+
+- Delete a specified registry key:
+
+`regedit -D {{path/to/registry_key}}`
+
+- Display help:
+
+`regedit -?`