Update cheatsheets

tldr/linux/mhwd-gpu

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# mhwd-gpu
+
+> Configure graphics cards in Manjaro.
+> More information: <https://wiki.manjaro.org/index.php/Configure_NVIDIA_(non-free)_settings_and_load_them_on_Startup/en#Configure_The_Resolution.2FRefresh_Rate>.
+
+- Show current Xorg configuration path:
+
+`mhwd-gpu --status`
+
+- Check if Xorg configuration has a valid symlink:
+
+`mhwd-gpu --check`
+
+- Set a custom Xorg configuration for an Nvidia GPU:
+
+`sudo mhwd-gpu --setmod nvidia --setxorg /{{path/to/nvidia.conf}}`
+
+- Set a custom Xorg configuration for an AMD GPU:
+
+`sudo mhwd-gpu --setmod {{catalyst|ati}} --setxorg /{{path/to/amdgpu.conf}}`
+
+- Display help:
+
+`mhwd-gpu --help`