fix(docs): rename task-handler.md to timer-handler.md (#3203)

since all task facility is already switched to timer facility

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

docs/intro/index.md

@@ -158,7 +158,7 @@ See the [Porting](/porting/display) section to learn more.
 ### My display driver is not called. What have I missed?
 Be sure you are calling `lv_tick_inc(x)` in an interrupt and `lv_timer_handler()` in your main `while(1)`.
 
-Learn more in the [Tick](/porting/tick) and [Task handler](/porting/task-handler) sections.
+Learn more in the [Tick](/porting/tick) and [Timer handler](/porting/timer-handler) sections.
 
 ### Why is the display driver called only once? Only the upper part of the display is refreshed.
 Be sure you are calling `lv_disp_flush_ready(drv)` at the end of your "*display flush callback*".

docs/overview/timer.md

@@ -5,7 +5,7 @@
 # Timers
 
 LVGL has a built-in timer system. You can register a function to have it be called periodically. The timers are handled and called in `lv_timer_handler()`, which needs to be called every few milliseconds.
-See [Porting](/porting/task-handler) for more information.
+See [Porting](/porting/timer-handler) for more information.
 
 Timers are non-preemptive, which means a timer cannot interrupt another timer. Therefore, you can call any LVGL related function in a timer.
 

docs/porting/index.md

@@ -14,7 +14,7 @@
    display
    indev
    tick
-   task-handler
+   timer-handler
    sleep
    os
    log

docs/porting/project.md

@@ -67,4 +67,4 @@ To use the graphics library you have to initialize it and setup required compone
 2. Initialize your drivers.
 3. Register the display and input devices drivers in LVGL.  Learn more about [Display](/porting/display) and [Input device](/porting/indev) registration.
 4. Call `lv_tick_inc(x)` every `x` milliseconds in an interrupt to report the elapsed time to LVGL. [Learn more](/porting/tick).
-5. Call `lv_timer_handler()` every few milliseconds to handle LVGL related tasks. [Learn more](/porting/task-handler).
+5. Call `lv_timer_handler()` every few milliseconds to handle LVGL related tasks. [Learn more](/porting/timer-handler).

docs/porting/timer-handler.md

@@ -1,8 +1,8 @@
 ```eval_rst
 .. include:: /header.rst
-:github_url: |github_link_base|/porting/task-handler.md
+:github_url: |github_link_base|/porting/timer-handler.md
 ```
-# Task Handler
+# Timer Handler
 
 To handle the tasks of LVGL you need to call `lv_timer_handler()` periodically in one of the following:
 - *while(1)* of *main()* function