shell must be defined for run steps in action.yml

Author: iMattPro

actions/install-dependencies/action.yml

@@ -32,6 +32,7 @@ runs:
     - name: Run npm ci
       if: ${{ inputs.RUN_NPM_INSTALL == '1' }}
       run: npm ci
+      shell: bash
       working-directory: ./phpBB3/phpBB/ext/${{ inputs.EXTNAME }}
 
     - name: Cache Composer dependencies
@@ -47,4 +48,5 @@ runs:
     - name: Install Composer dependencies
       if: ${{ inputs.RUN_COMPOSER_INSTALL == '1' }}
       run: composer install
+      shell: bash
       working-directory: ./phpBB3/phpBB/ext/${{ inputs.EXTNAME }}