docs: remove version numbers from DriverAssistant and RKDevTool download links#1719

Milir-Radxa merged 2 commits intoradxa-docs:mainradxa-docs/docs:mainfrom

tangzz-radxa:fix/driverassistant-rkdevtool-versionless-linkstangzz-radxa/docs:fix/driverassistant-rkdevtool-versionless-linksCopy head branch name to clipboard