Bump pxapi to 0.9.1 after Authlib upgrade #3007

Job	Run time
env-protect-setup	8s
authorize	4s
get-dev-image / get-image	8s
clang-tidy	1m 1s
generate-matrix	3m 29s
code-coverage	0s
build-and-test (Clang opt + UI, nokvm, --config=clang --compilation_mode=opt, bazel_buildables_cl...	2m 47s
build-and-test (Go race detector, nokvm, --config=go_race --compilation_mode=opt, bazel_buildable...	2m 30s
build-and-test-status	2s
	10m 9s

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