skip certs (#5819)

# Description of Changes

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## Checklist

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- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
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Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
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Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
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- [ ] My changes generate no new warnings

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.github/workflows/tauri-build.yml

@@ -73,6 +73,7 @@ jobs:
     env:
       SM_API_KEY: ${{ secrets.SM_API_KEY }}
       WINDOWS_CERTIFICATE: ${{ secrets.WINDOWS_CERTIFICATE }}
+      APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
     steps:
       - name: Harden Runner
         uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
@@ -271,7 +272,7 @@ jobs:
           }
 
       - name: Import Apple Developer Certificate
-        if: matrix.platform == 'macos-15' || matrix.platform == 'macos-15-intel'
+        if: (matrix.platform == 'macos-15' || matrix.platform == 'macos-15-intel') && env.APPLE_CERTIFICATE != ''
         env:
           APPLE_CERTIFICATE: ${{ secrets.APPLE_CERTIFICATE }}
           APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
@@ -292,7 +293,7 @@ jobs:
           rm certificate.p12
 
       - name: Verify Certificate
-        if: matrix.platform == 'macos-15' || matrix.platform == 'macos-15-intel'
+        if: (matrix.platform == 'macos-15' || matrix.platform == 'macos-15-intel') && env.APPLE_CERTIFICATE != ''
         run: |
           echo "Verifying Apple Developer Certificate..."
           KEYCHAIN_PATH=$RUNNER_TEMP/app-signing.keychain-db