Fix escaped slashes

Author: grynspan

.github/workflows/swift_package_test.yml

@@ -103,7 +103,7 @@ on:
       ios_build_command:
         type: string
         description: "macOS command to build the package for iOS"
-        default: "xcrun swift build --build-tests --sdk "$(xcrun --sdk iphoneos --show-sdk-path)" --triple arm64-apple-ios"
+        default: "xcrun swift build --build-tests --sdk \"$(xcrun --sdk iphoneos --show-sdk-path)\" --triple arm64-apple-ios"
       linux_build_command:
         type: string
         description: "Linux command to build and test the package"