docs: Fix minor issues in docs/usage/applications.rst #2201

Job	Run time
validate	13s
mypy	1m 31s
pyright	1m 30s
Test server integration (uvicorn<0.27.0)	1m 5s
Test server integration (uvicorn>=0.27.0)	55s
test-platform-compat	0s
test (3.10) / test	1m 47s
test (3.11) / test	1m 35s
test (3.12) / test	2m 43s
test (3.8) / test	2m 34s
test (3.9) / test	1m 49s
build-docs	2m 40s
upload-test-coverage	22s
codeql	3m 13s
sonar	0s
	21m 57s

Provide feedback