Do final changelog changes. #9394

Job	Run time
base-tests (./cli)	3m 11s
base-tests (./envision)	3m 22s
base-tests (./smarts/core --nb-exec-timeout 65536 --ignore=./smarts/core/tests/test_notebook.py)	4m 45s
base-tests (./smarts/env --ignore=./smarts/env/tests/test_rllib_hiway_env.py)	4m 42s
base-tests (./smarts/env/tests/test_rllib_hiway_env.py)	3m 32s
base-tests (./smarts/sstudio)	2m 49s
base-tests (./smarts/ray)	3m 23s
base-tests (./examples/tests/test_examples.py)	5m 36s
benchmark (e10_drive)	3m 25s
benchmark (e11_platoon)	2m 4s
examples-rl (e10_drive)	5m 8s
examples-rl (e11_platoon)	3m 2s
	44m 59s

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