message: Update Changelog for 0.7.1.
diff: # CHANGELOG
  -## 0.7.1 - UNRELEASED
  +## 0.7.1 - 2020-10-22
  Requires `libfranka` >= 0.7.0
  - * `franka_example_controllers` : Added example for dual-arm teleoperation based on franka_combinable_hw.
  + * `franka_example_controllers`: Added example for dual-arm teleoperation based on `franka_combinable_hw`.
  * `franka_gripper`: Made stopping on shutdown optional.
  + * `franka_hw`: Added `franka_control_services` install instruction.
  ## 0.7.0 - 2020-07-15
  @@ -13,7 +14,7 @@ Requires `libfranka` >= 0.7.0
  * **BREAKING** moved services and action from `franka_control` to `franka_msgs`.
  * **BREAKING** moved Service container from `franka_control` to `franka_hw`.
  - * `franka_example_controllers` : Added example for dual-arm control based on franka_combinable_hw.
  + * `franka_example_controllers`: Added example for dual-arm control based on `franka_combinable_hw`.
  * `franka_description` :
  - Added an example urdf with two panda arms.
  - **BREAKING** Updated collision volumes.
  