treewide: Fix feedack typo

Signed-off-by: Guido Günther <agx@sigxcpu.org>

data/org.sigxcpu.feedbackd.gschema.xml

@@ -39,7 +39,7 @@
                 'sm.puri.OSK0']</default>
       <summary>List of apps that can override the feedback level</summary>
       <description>
-        Apps listed here can override the configured feedack level by
+        Apps listed here can override the configured feedback level by
         setting the 'important' hint on the submitted event.
       </description>
     </key>

libfeedback/lfb-event.c

@@ -687,7 +687,7 @@ lfb_event_end_feedback_async (LfbEvent            *self,
  * @self: The event
  * @timeout: The timeout
  *
- * Tells the feedback server to end feedack after #timeout seconds.
+ * Tells the feedback server to end feedback after #timeout seconds.
  * The value -1 indicates to not set a timeout and let feedbacks stop
  * on their own while 0 indicates to loop all feedbacks endlessly.
  * They must be stopped via [method@LfbEvent.end_feedback] in this case.

src/fbd-feedback-manager.c

@@ -371,7 +371,7 @@ parse_hints (GVariant                *hints,
 /**
  * add_event_feedbacks:
  *
- * Add the suitable feedacks to the event.
+ * Add the suitable feedbacks to the event.
  *
  * Returns: `TRUE` if at least on feedback was added.
  */