Update footer example in docs to match new format

Author: fprochazka

README.md

@@ -173,7 +173,7 @@ slack messages list '#general' --json
 
 # Pagination output: when more messages exist on either side of the returned
 # slice, the text output prints a trailing footer such as
-#     [... older -- --before 1234.5678 | newer -- --after 2345.6789]
+#     [older: --before 1234.5678 | newer: --after 2345.6789]
 # and the JSON envelope includes `has_more_before`, `has_more_after`,
 # `next_before_ts`, and `next_after_ts`. Use these cursors to page further.
 

coding-agent-plugins/claude-code/skills/slackcli/SKILL.md

@@ -121,9 +121,12 @@ slice.
 **Text mode** — a trailing footer is printed when there is more to fetch, e.g.:
 
 ```
-[... older -- --before 1234.5678 | newer -- --after 2345.6789]
+[older: --before 1234.5678 | newer: --after 2345.6789]
 ```
 
+In thread view the labels change to `earlier replies` / `later replies` so
+it's clear the cursors page within the thread.
+
 Feed either cursor back into a new call to page further:
 
 ```bash