Fix yaml

Author: tomcombriat

.github/workflows/compile_examples.yml

@@ -67,7 +67,7 @@ jobs:
             platforms: |
               - name: esp8266:esp8266
                 #source-url: https://arduino.esp8266.com/stable/package_esp8266com_index.json
-		source-url: https://github.com/mcspr/esp8266-Arduino/releases/download/3.2.0-dev/package_esp8266com_index.json
+                source-url: https://github.com/mcspr/esp8266-Arduino/releases/download/3.2.0-dev/package_esp8266com_index.json
             internalid: esp8266
           - fqbn: STMicroelectronics:stm32:GenF1:pnum=BLUEPILL_F103C8
             platforms: |