fix typo in github action for STM32

Author: Richard Unger

.github/workflows/ccpp.yml

@@ -77,7 +77,7 @@ jobs:
 
           - arduino-boards-fqbn: STMicroelectronics:stm32:Nucleo_64:pnum=NUCLEO_F411RE # nucleo one full example
             platform-url: https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json 
-            sketch-names: single_full_control_example.ino, stm32_spi_alt_example.ino, sdouble_full_control_example.ino, stm32_current_control_low_side.ino
+            sketch-names: single_full_control_example.ino, stm32_spi_alt_example.ino, double_full_control_example.ino, stm32_current_control_low_side.ino
 
 
       # Do not cancel all jobs / architectures if one job fails