ros1_bridge: 0.9.4-1 in 'foxy/distribution.yaml' [bloom]

[dirk-thomas]

Increasing version of package(s) in repository ros1_bridge to 0.9.4-1:

• upstream repository: https://github.com/ros2/ros1_bridge.git
• release repository: https://github.com/ros2-gbp/ros1_bridge-release.git
• distro file: foxy/distribution.yaml
• bloom version: 0.9.8
• previous version for package: 0.9.3-7

ros1_bridge

* use hardcoded QoS (keep all, transient local) for /tf_static topic in dynamic_bridge (#282 <https://github.com/ros2/ros1_bridge/issues/282>)
* document explicitly passing the topic type to 'ros2 topic echo' (#279 <https://github.com/ros2/ros1_bridge/issues/279>)