Update cheatsheets

tldr/linux/dnf-group

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# dnf group
+
+> Manage virtual collections of packages on Fedora-based systems.
+> More information: <https://manned.org/man/dnf-group>.
+
+- List DNF groups, showing installed and uninstalled status in a table:
+
+`dnf group list`
+
+- Show DNF group info, including repository and optional packages:
+
+`dnf group info {{group_name}}`
+
+- Install DNF group:
+
+`dnf group install {{group_name}}`
+
+- Remove DNF group:
+
+`dnf group remove {{group_name}}`
+
+- Upgrade DNF group:
+
+`dnf group upgrade {{group_name}}`