Update cheatsheets

tldr/reuse

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# reuse
+
+> Tool for compliance with the REUSE recommendations.
+> More information: <https://reuse.readthedocs.io/en/stable/man/index.html>.
+
+- Lint for REUSE compliance for the current project (version control aware):
+
+`reuse lint`
+
+- Lint for REUSE compliance from the specified directory:
+
+`reuse --root {{path/to/directory}} lint`
+
+- Download a license by its SPDX identifier and place it in the LICENSES directory:
+
+`reuse download {{spdx-identifier}}`
+
+- Download all missing licenses detected in the project:
+
+`reuse download --all`