fix: fix python 3.9 compatibility (#462) #1920

Job	Run time
Prepare Environment Variables	36s
Build Development Image / Build Development Image	42m 26s
Test / Check Python Format	1m 28s
Test / Run Python Unit Tests	7m 5s
Test / Run C++ Unit Tests	10m 26s
Test / Check C++ Format	1m 40s
Package / Build Python Package (linux/amd64)	6m 39s
Package / Build Python Package (linux/arm64)	44m 10s
Package / Build Documentation	11m 23s
Package / Build C++ Package (linux/amd64)	6m 46s
Package / Build C++ Package (linux/arm64)	41m 43s
Benchmark and Validate / Benchmark C++	5m 38s
Benchmark and Validate / Run C++ Validation Tests	11m 18s
	3h 11m 18s

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