fix formatting error in build-test-deploy.yml

Author: djm21

.github/workflows/build-test-deploy.yml

@@ -23,7 +23,6 @@ jobs:
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
         os-version: ['ubuntu-20.04', 'windows-latest', 'macos-latest']
-        exclude:
 # Pinned Ubuntu version to 20.04 since no Python 3.6 builds available on ubuntu-latest (22.04) as of 2022-12-7.
 #        os-version: [ubuntu-latest, windows-latest, macos-latest]