Release v2.62.0

What's Changed

• Set default streams value in grpc-client.yml by @sebastienros in #2379
• Fix OS detection error in UWP by @JamesNK in #2376
• Update Grpc.Tools version to 2.62 by @apolcyn in #2382
• Bump v2.62.x to pre1 by @apolcyn in #2383
• Bump v2.62.x version for final release by @apolcyn in #2400

Full Changelog: v2.61.0...v2.62.0