Update cheatsheets

hg

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# hg
+
+> Mercurial - a distributed source control management system.
+> Some subcommands such as `hg commit` have their own usage documentation.
+> More information: <https://www.mercurial-scm.org>.
+
+- Execute a Mercurial command:
+
+`hg {{command}}`
+
+- Display help:
+
+`hg help`
+
+- Display help for a specific command:
+
+`hg help {{command}}`
+
+- Check the Mercurial version:
+
+`hg --version`