[Ruby] Needless conversion in `Arrow::TimestampArrayBuilder`

[kou]

Describe the bug, including details regarding any error messages, version, and platform.

arrow/ruby/red-arrow/lib/arrow/timestamp-array-builder.rb

Line 33 in c9adb63

if value.respond_to?(:to_time) and not value.is_a?(Time)

misses :: to refer ::Time.

If we don't prepend :: here, Time refers Arrow::Time not Time.

Component(s)

Ruby

[kou]

Issue resolved by pull request 47267
#47267