Fix code scanning alert no. 8: Use of Kernel.open or IO.read or similar sinks with a non-constant value

[george-gca]

Fixes https://github.com/george-gca/multi-language-al-folio/security/code-scanning/8

To fix the problem, we should replace the use of URI.open with a safer alternative that does not call Kernel.open internally. Specifically, we can use Net::HTTP to perform the HTTP request and read the file content. This approach avoids the security risks associated with URI.open.

1. Replace the URI.open call with Net::HTTP to fetch the content of the URL.
2. Update the download_file method to use Net::HTTP for downloading the file.
3. Ensure that the new implementation maintains the existing functionality of downloading the file and saving it to the specified destination.

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