Fix Sparkle public key extraction to use -p flag

- Change from -x flag to -p flag for public key extraction
- -p flag is for extracting public key from private key
- -x flag was causing the extraction to fail
- Fix 'Process completed with exit code 1' error in key extraction
- Ensure proper Sparkle public key generation in CI/CD pipeline

Author: devopsmariocom

.github/workflows/build-and-release.yml

@@ -218,7 +218,7 @@ jobs:
           
           # Extract public key from private key
           echo "🔑 Extracting public key from private key..."
-          ./bin/generate_keys -x keys/ed25519_private_key.pem > keys/ed25519_public_key.pem
+          ./bin/generate_keys -p keys/ed25519_private_key.pem > keys/ed25519_public_key.pem
           
           # Verify public key was created
           if [ ! -f "keys/ed25519_public_key.pem" ] || [ ! -s "keys/ed25519_public_key.pem" ]; then