add samd11 to ci

Author: hathach

.github/workflows/build.yml

@@ -39,6 +39,7 @@ jobs:
         - 'imxrt'
         - 'nrf'
         - 'rp2040'
+        - 'samd11'
         - 'samd21'
         - 'samd51'
         - 'stm32f4'