doc: Added unmute-on-scroll to changelog and module descriptions

CHANGELOG.md

@@ -9,6 +9,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- An option `unmute-on-scroll` for `internal/pulseaudio` and `internal/alsa` to unmute audio when the user scrolls on the widget.
 
 ## [3.7.1] - 2023-11-27
 ### Build

doc/user/actions.rst

@@ -153,6 +153,9 @@ internal/alsa
   ``interval`` is the config setting in the module. Volume changed like this
   will never go above 100%.
 
+  if ``unmute-on-scroll`` is turned on, the sound will also be unmuted when
+  this action is called.
+
 :``toggle``:
   Toggles between muted and unmuted.
 
@@ -165,6 +168,9 @@ internal/pulseaudio
   will never go above ~153% (if ``use-ui-max`` is set to ``true``) or 100% (if
   not).
 
+  if ``unmute-on-scroll`` is turned on, the sound will also be unmuted when
+  this action is called.
+
 :``toggle``:
   Toggles between muted and unmuted.