Update capitalization of "merge request"
Yet more instances of fixing stray capitalization of "merge request" to make our UI 100% consistent in usage. This MR updates...
modified: bin/changelog
modified: bin/feature-flag
modified: data/whats_new/202008180003_13_01.yml
modified: data/whats_new/202009150001_13_03.yml
modified: data/whats_new/202011230001_13_06.yml
modified: data/whats_new/202012160001_13_07.yml
modified: data/whats_new/202103220001_13_10.yml
modified: data/whats_new/templates/YYYYMMDD0001_XX_YY.yml
modified: ee/config/metrics/counts_28d/20210216175103_merge_requests_with_added_rules.yml
modified: ee/config/metrics/counts_all/20210216175047_merge_requests_with_added_rules.yml
modified: scripts/verify-tff-mapping
modified: workhorse/_support/changelog
Related issues
Related to #233449 (closed) where the work is being collected