docs(block-kit): match time_picker first docstring line to the JS wording

Align the element-purpose first line to the reviewed JS example so the two
sets read identically. NB: the docs time-picker `summary:` frontmatter is
a known upstream bug (it carries the number-input text); JS mirrors it and
Python now matches. Both will be re-aligned to the corrected wording once
the docs summary fix lands (tracked in the devspace-dotfiles queue).

Co-Authored-By: Claude <svc-devxp-claude@slack-corp.com>

Author: zimeg

block-kit/src/elements/time_picker.py

@@ -5,7 +5,7 @@
 
 def example01() -> SectionBlock:
     """
-    Allows users to select a time of day.
+    Allows users to enter numerical data into a single-line field.
     https://docs.slack.dev/reference/block-kit/block-elements/time-picker-element/
 
     A section block with a time picker accessory.