Replace `BLACKLIST` with `OMIT_LIST`

[jonathanstegall]

Changes

This pull request makes the following changes:

• replace BLACKLIST with OMIT_LIST in release.sh and the instructions for it.

Why

• for more inclusive language

Testing/Questions

Features that this PR affects:

• the release.sh file and its instructions

Steps to test this PR:

1. Make sure the release.sh file still runs and ignores the files in the OMIT_LIST

Additional information

INN Member/Labs Client requesting: MinnPost

• [x] Contributor has read INN's GitHub code of conduct
• [x] Contributor would like to be mentioned in the release notes as: jonathanstegall
• [x] Contributor agrees to the license terms of this repository.