add apple signing certificates

fix

Author: emawby

.github/workflows/cd.yml

@@ -27,7 +27,13 @@ jobs:
         with:
           xcode-version: '14.1'
       - name: Checkout OneSignal-iOS-SDK
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+
+      - name: Install the Apple certificate and provisioning profile
+        uses: apple-actions/import-codesign-certs@v2
+        with: 
+          p12-file-base64: ${{ secrets.CERTIFICATES_P12 }}
+          p12-password: ${{ secrets.CERTIFICATES_P12_PASSWORD }}
       # - name: Bump Version Number
       #   run: |