chore: fix spelling (#6401)

Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>

demos/benchmark/lv_demo_benchmark.h

@@ -45,7 +45,7 @@ extern "C" {
  *   but simply the time difference between the start and end of the rendering is measured
  *
  * - Flush time: It's the sum of
- *     - the time spent in the `fluch_cb` and
+ *     - the time spent in the `flush_cb` and
  *     - the time spent with waiting for flush ready.
  */
 void lv_demo_benchmark(void);

demos/music/README.md

@@ -23,5 +23,5 @@ The music player demo shows what kind of modern, smartphone-like user interfaces
 	
 ## Using spectrum.py
 - install `librosa` with `pip3 install librosa`	
-- run `python sectrum.py my_file.mp3`
+- run `python spectrum.py my_file.mp3`
 - see the result in `spectrum.h`