fix(bitbucket): use correct case (#21002)

docs/usage/faq.md

lib/constants/platform.spec.ts

lib/modules/datasource/api.ts

lib/modules/datasource/bitbucket-tags/index.spec.ts

lib/modules/datasource/bitbucket-tags/index.ts

lib/modules/datasource/go/base.ts

lib/modules/datasource/go/common.ts

lib/modules/datasource/go/index.ts

lib/modules/datasource/go/releases-direct.ts

lib/modules/manager/bitbucket-pipelines/extract.ts

lib/modules/manager/deps-edn/extract.ts

lib/modules/manager/flux/extract.spec.ts

lib/modules/manager/flux/extract.ts

lib/modules/manager/flux/index.ts

lib/modules/manager/terraform/extractors/others/modules.ts

lib/modules/manager/terraform/index.ts

lib/modules/platform/bitbucket-server/index.ts

lib/modules/platform/bitbucket/comments.ts

lib/modules/platform/bitbucket/index.md