docs: link to context actions block and related reference (#1789)

Author: zimeg

slack_sdk/models/blocks/basic_components.py

@@ -551,6 +551,7 @@ def __init__(
     ):
         """
         A feedback button element object for either positive or negative feedback.
+        https://docs.slack.dev/reference/block-kit/block-elements/feedback-buttons-element#button-object-fields
 
         Args:
             text (required): An object containing some text. Maximum length for this field is 75 characters.

slack_sdk/models/blocks/block_elements.py

@@ -561,6 +561,7 @@ def __init__(
         **others: dict,
     ):
         """Buttons to indicate positive or negative feedback.
+        https://docs.slack.dev/reference/block-kit/block-elements/feedback-buttons-element
 
         Args:
             action_id (required): An identifier for this action.
@@ -650,6 +651,7 @@ def __init__(
         **others: dict,
     ):
         """An icon button to perform actions.
+        https://docs.slack.dev/reference/block-kit/block-elements/icon-button-element
 
         Args:
             action_id: An identifier for this action.

slack_sdk/models/blocks/blocks.py

@@ -375,6 +375,7 @@ def __init__(
         **others: dict,
     ):
         """Displays actions as contextual info, which can include both feedback buttons and icon buttons.
+        https://docs.slack.dev/reference/block-kit/blocks/context-actions-block
 
         Args:
             elements (required): An array of feedback_buttons or icon_button block elements. Maximum number of items is 5.