Small fixes to RELEASE_PROCEDURE.md
Small fixes to RELEASE_PROCEDURE.md

Susurrus/nix,berkowski/nix,MarkusJais/nix-rust,geofft/nix-rust,kamalmarhubi/nix-rust,berkowski/nix,carllerche/nix-rust,geofft/nix-rust,carllerche/nix-rust,berkowski/nix,Susurrus/nix,asomers/nix,nix-rust/nix,kamalmarhubi/nix-rust,geofft/nix-rust,asomers/nix,Susurrus/nix,posborne/rust-nix,nix-rust/nix,xd009642/nix,posborne/rust-nix,MarkusJais/nix-rust,carllerche/nix-rust,kamalmarhubi/nix-rust,xd009642/nix,xd009642/nix,posborne/rust-nix,MarkusJais/nix-rust