Doc: update readme and changelog

Author: CarterLi

CHANGELOG.md

@@ -35,6 +35,7 @@ Bugfixes:
 * Fix some memory leaks
 * Fix used swap space detection (Swap, FreeBSD)
 * Don't leak fds to child processes (Linux)
+* Fix possible issues when reading procfs (Linux)
 
 Logos:
 * Add Adelie, Ironclad

README.md

@@ -62,7 +62,7 @@ See Wiki: https://github.com/fastfetch-cli/fastfetch/wiki/Building
 * Run it with [all supported modules](https://github.com/fastfetch-cli/fastfetch/wiki/Support+Status#available-modules) and find what you interest: `fastfetch -c all.jsonc`
 * Find all data that fastfetch detects: `fastfetch -s <module> --format json`
 * Display help messages: `fastfetch --help`
-* Generate config file based on command line arguments: `fastfetch --arg1 --arg2 --migrate-config`
+* Generate config file based on command line arguments: `fastfetch --arg1 --arg2 --gen-config`
 
 ## Customization