Update compile-sketches-stm32.yml

Author: qqqlab

.github/workflows/compile-sketches-stm32.yml

@@ -11,4 +11,5 @@ jobs:
               source-url: https://github.com/stm32duino/BoardManagerFiles/raw/main/package_stmicroelectronics_index.json
           fqbn: STMicroelectronics:stm32:GenF4:pnum=GENERIC_F405RGTX
           libraries: |
+           - source-path: ./
            - name: STM32duino FreeRTOS