Add step to create a GPT4All cache folder to the docs

[andrii-i]

Problem

GPT4All usage section of the docs has instructions on how to install gpt4all models

For each model you use, you will have to run the command

curl -LO --output-dir ~/.cache/gpt4all "<model-bin-url>"

if .cache or gpt4all folder does not exist, command will fail with error

Warning: /Users/.../.cache/gpt4all/ggml-gpt4all-l13b-snoozy.bin: No such
Warning: file or directory
  0 7759M    0 46864    0     0  92400      0 24:27:40 --:--:-- 24:27:40 93168
curl: (23) Failure writing output to destination

Solution

Add step to create a GPT4All cache folder to the docs

[JasonWeill]

@meeseeksdev please backport to 1.x