docs: update Arch and Nix community links (#2454)

Author: panchoh

website/src/docs/community.md

@@ -22,10 +22,11 @@ can view the full list of community integrations
 
 Some installation methods are maintained by third party:
 
-- [AUR](https://aur.archlinux.org/packages/go-task-bin) by @carlsmedstad
+- [Arch Linux](https://archlinux.org/packages/extra/x86_64/go-task/)
+- [AUR](https://aur.archlinux.org/packages/go-task-git) by @C0rn3j
 - [Scoop](https://github.com/ScoopInstaller/Main/blob/master/bucket/task.json)
 - [Fedora](https://packages.fedoraproject.org/pkgs/golang-github-task/go-task/)
-- [NixOS](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/tools/go-task/default.nix)
+- [Nix](https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/go/go-task/package.nix)
 - [Conda](https://github.com/conda-forge/go-task-feedstock/)
 
 ## More

website/src/docs/installation.md

@@ -191,7 +191,7 @@ dnf install go-task
 pkg install task
 ```
 
-### NixOS ([nix](https://nixos.org)) ![NixOS](https://img.shields.io/badge/NixOS-5277C3?logo=nixos&logoColor=fff) ![Linux](https://img.shields.io/badge/Linux-FCC624?logo=linux&logoColor=black) {#nix}
+### [Nix](https://nixos.org) ![Nix](https://img.shields.io/badge/Nix-5277C3?logo=nixos&logoColor=fff) ![NixOS](https://img.shields.io/badge/NixOS-5277C3?logo=nixos&logoColor=fff) ![Linux](https://img.shields.io/badge/Linux-FCC624?logo=linux&logoColor=black) ![macOS](https://img.shields.io/badge/MacOS-000000?logo=apple&logoColor=F0F0F0) {#nix}
 
 [[source](https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/go/go-task/package.nix)]
 

website/src/docs/releasing.md

@@ -61,7 +61,7 @@ If you think its Task version is outdated, open an issue to let us know.
 
 Nix is a community owned installation method. Nix package maintainers usually
 take care of updating versions there by editing
-[this file](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/by-name/go/go-task/package.nix).
+[this file](https://github.com/NixOS/nixpkgs/blob/master/pkgs/by-name/go/go-task/package.nix).
 If you think its Task version is outdated, open an issue to let us know.
 
 [goreleaser]: https://goreleaser.com/