Add commit message to workflow

Author: nseidle

.github/workflows/compile-rtk-firmware.yml

@@ -126,6 +126,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           directory: ./Firmware/RTK_Surveyor
           branch: ${{ env.BRANCH }}
+          message: 'Update form.h via Python ${date}'
 
       - name: Copy custom app3M_fat9M_16MB.csv
         run: