[202012][submodule] Update sonic-utilities submodule (#7528)

Includes below commits:
```
3f8bc52 2021-05-05 | Relax the install_requires, no need to exact version as long as there are no broken changes with future versions (#1530) (#1592) [Qi Luo]
```
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Qi Luo 2021-05-05 18:39:31 -07:00 committed by GitHub
parent b0460c7ce1
commit 97066cbf46
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@ -1 +1 @@
Subproject commit efa0924a6ec7fdf5d6da7f7f39fe43c3c16703c7 Subproject commit 3f8bc5206897be337a4437ab863cef8513f734f3