docs: update dmg format (#5703)

## Issue being fixed or feature implemented
Docs was slightly incorrect after moving to guix

## What was done?
fixed docs

## How Has This Been Tested?
Did notarization :)

## Breaking Changes


## Checklist:
_Go over all the following points, and put an `x` in all the boxes that
apply._
- [x] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have added or updated relevant unit/integration/functional/e2e
tests
- [ ] I have made corresponding changes to the documentation
- [x] I have assigned this pull request to a milestone _(for repository
code-owners and collaborators only)_

doc/release-process.md

@@ -215,7 +215,7 @@ Open Terminal, and navigate to the location of the .dmg file.
 Then, run the following command to notarize the .dmg file:
 
 ```
-xcrun notarytool submit dashcore-{version}-osx.dmg --keychain-profile "AC_PASSWORD" --wait
+xcrun notarytool submit dashcore-{version}-{x86_64, arm64}-apple-darwin.dmg --keychain-profile "AC_PASSWORD" --wait
 ```
 Replace "{version}" with the version you are notarizing. This command uploads the .dmg file to Apple's notary service.