[sonic-swss-common] Update submodule (#6686)

Includes below commits
```
9e91e0d 2021-02-04 | Fix: RedisClient.set() should return bool (#454) [Qi Luo]
244a0bf 2021-02-04 | [swig] Add missing functions for ConfigDBConnector (#453) [Qi Luo]
e659698 2021-01-22 | [dbconnector] Make sure json is declared as non null object (#452) [Kamil Cudnik]
```
This commit is contained in:
Qi Luo 2021-02-05 12:47:04 -08:00 committed by GitHub
parent fa89c6dd8f
commit d4b852abd2
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@ -1 +1 @@
Subproject commit e49b18f2512a9331579cea37ab199730051a68e9
Subproject commit 9e91e0d891398b468b8087682ae91335791fac51