Switch back to main boards branch

Author: tyeth

.github/workflows/build-clang-doxy.yml

@@ -418,7 +418,6 @@ jobs:
         with:
           repository: adafruit/Wippersnapper_Boards
           path: ws-boards
-          ref: add-c5devkit
       - name: Install CI-Arduino
         run: bash ci/actions_install.sh
       - name: Install extra Arduino libraries
@@ -957,7 +956,6 @@ jobs:
         with:
           repository: adafruit/Wippersnapper_Boards
           path: ws-boards
-          ref: add-c5devkit
       - name: Install CI-Arduino
         run: bash ci/actions_install.sh
       - name: Install extra Arduino libraries