fix: correct release-please manifest format to resolve version parsing error

[SeddikBellamine]

🔧 Fix Release-Please Version Parsing Error

This PR fixes the error that was occurring in the release-please workflow.

🐛 Problem

The file was using an invalid format that caused release-please to fail when trying to parse version strings.

✅ Solution

Updated the manifest file to use the correct format:

• Before: Empty/invalid format
• After:

🎯 What This Fixes

• Resolves error
• Enables proper version parsing for release-please
• Allows automated releases to work correctly
• Maintains alpha version support for both SDK and DApp packages

📋 Changes Made

• Fixed format to match release-please expectations
• Used simple key-value format instead of nested objects
• Maintained correct version numbers for both packages

This fix ensures that release-please can properly parse version strings and create automated releases without errors.