chore(rubocop): move LineLength cop from Metrics to Layout [skip ci]

* Automated using myii/ssf-formula#129

Author: myii

.rubocop.yml

@@ -2,7 +2,7 @@
 # vim: ft=yaml
 ---
 # General overrides used across formulas in the org
-Metrics/LineLength:
+Layout/LineLength:
   # Increase from default of `80`
   # Based on https://github.com/PyCQA/flake8-bugbear#opinionated-warnings (`B950`)
   Max: 88