[#213][Python/Pre-commit] Set Black Max Line Length to 79.

This is to make it compatible with other Python tools that we are about
to adopt.

.pre-commit-config.yaml

@@ -165,6 +165,7 @@ repos:
     rev: 24.4.2
     hooks:
       - id: black
+        args: [--line-length, '79']
   - repo: https://github.com/pycqa/isort
     rev: 5.13.2
     hooks: