(chore) bump version to v1.31.3 for release #1039

Job	Run time
Compatibility	29s
Pydantic V1	13s
Docker	18s
ubuntu-latest - python 3.8 - Lint	13s
ubuntu-latest - python 3.8 - Type check	23s
ubuntu-latest - python 3.8 - Unit tests	1m 5s
ubuntu-latest - python 3.8 - Doc tests	1m 39s
ubuntu-latest - python 3.8 - Doc tests (B)	1m 23s
ubuntu-latest - python 3.8 - Images	38s
ubuntu-latest - python 3.8 - Jobs	19s
ubuntu-latest - python 3.8 - Experiments	32s
ubuntu-latest - python 3.8 - Datasets	55s
ubuntu-latest - python 3.8 - Sweep example	44s
ubuntu-latest - python 3.8 - Build	23s
ubuntu-latest - python 3.8 - Style	32s
ubuntu-latest - python 3.8 - Docs	27s
Release	0s
	10m 13s

Provide feedback