feat: set header as user agent in the file options (#2315)
feat: set header as user agent in the file options (#2315)

* set the header key with user agent
couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios,couchbase/couchbase-lite-ios