Bump dubbo from 2.7.18 to 2.7.21 in /mse-simple-demo/C

[dependabot[bot]]

Bumps dubbo from 2.7.18 to 2.7.21.

Release notes

Sourced from dubbo's releases.

dubbo-2.7.21

What's Changed

• Update check list

Full Changelog: https://github.com/apache/dubbo/compare/dubbo-2.7.20...dubbo-2.7.21

dubbo-2.7.20

What's Changed

• Fix Nacos ServiceName error by @​AlbumenJ in apache/dubbo#11180
• Add router fail fast option (Backport #9388) by @​AlbumenJ in apache/dubbo#11188

Full Changelog: https://github.com/apache/dubbo/compare/dubbo-2.7.19...dubbo-2.7.20

dubbo-2.7.19

What's Changed

• Fix nacos registry randomly throws no provider exception due to legacy service names
• Add system properties to support allow non-serializable class

New Contributors

• @​JiHongYuan made their first contribution in apache/dubbo#10674
• @​hujun-w-2 made their first contribution in apache/dubbo#11038

Full Changelog: https://github.com/apache/dubbo/compare/dubbo-2.7.18...dubbo-2.7.19

Commits

• 4e80ee5 Update NOTICE
• 1f40fde Prepare 2.7.21 release
• 6104444 Update list
• 6f4011f Bump to 2.7.21-SNAPSHOT
• 6200a89 Prepare 2.7.20 release
• bf29eb5 Add router fail fast option (Backport #9388) (#11188)
• 326fb72 Fix Nacos ServiceName error (#11180)
• d6341d9 bump to 2.7.20-SNAPSHOT
• 3e8c759 Prepare 2.7.19 release
• 37689d9 Cherry pick #9340
• Additional commits viewable in compare view

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