Add shells

.github/workflows/composite/build_base.yml

@@ -29,14 +29,17 @@ runs:
         key: ${{ runner.os }}-pip
 
     - name: Upgrade python tools
+      shell: bash
       run: |
         python -m pip install --upgrade pip
         pip install -U platformio adafruit-nrfutil
 
     - name: Upgrade platformio
+      shell: bash
       run: |
         pio upgrade
 
     - name: Get release version string
+      shell: bash
       run: echo "version=$(./bin/buildinfo.py long)" >> $GITHUB_OUTPUT
       id: version