Fix Fibonacci action feedback field name

[anishk85]

• Change feedback field from 'sequence' to 'partial_sequence'
• Updated in About-Interfaces.rst and About-Actions.rst
• Aligns with actual action definition used in tutorials

Fixes #4298

Fixed two files:

• About-Interfaces.rst
• About-Actions.rst

Changed the feedback field from sequence → partial_sequence to match what the rest of the documentation and code use.

In ROS 2 actions:

• Feedback = partial_sequence (progress updates while running)
• Result = sequence (final answer when done)

Having both called sequence was misleading!

Small fix, but should help avoid confusion for people learning about actions!

[fujitatomoya]

@anishk85 thanks for addressing this documentation fix.

before moving on with this PR, i believe that we should 1st resolve the confusion mentioned #4298 (comment), then we can move on to the documentation fix. (depending on the approach, the documentation fix will be different.)

especially if we take #4298 (comment) this way suggested by @ahcorde , this fix will be really different.

[anishk85]

Understanding the Situation

Thanks @fujitatomoya for the review! After reading through the discussion on #4298, I now understand the bigger picture.

The Root Cause

There are 3 different Fibonacci action definitions across ROS 2 repos:

Repository	Feedback Field	Status
action_tutorials_interfaces	partial_sequence	✅ Correct
example_interfaces	sequence	❌ Needs fix
test_interface_files	sequence	❌ Needs fix
ros2_documentation (concepts)	sequence	❌ Needs fix
ros2_documentation (tutorials)	partial_sequence	✅ Correct

This creates confusion for learners!

---

🎯 Agreed Solution (per maintainer discussion)

Phase 1: Standardize Source Packages

1. Keep example_interfaces/action/Fibonacci.action as canonical
2. Fix its feedback field: sequence → partial_sequence
3. Remove action_tutorials_interfaces (duplicate)
4. Remove test_interface_files/action/Fibonacci.action (duplicate)
5. Update all code importing these actions

Phase 2: Fix Documentation (This PR)

• Update About-Actions.rst
• Update About-Interfaces.rst

Okay I will wait till the confusion is resolved.