fix: correct Context type parameters across examples and tests #1368

Job	Run time
checks / readme-snippets	16s
checks / pre-commit	33s
checks / test (3.10, lowest-direct, windows-latest)	2m 42s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.13, lowest-direct, ubuntu-latest)	54s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.10, locked, windows-latest)	2m 13s
checks / test (3.11, locked, ubuntu-latest)	53s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.12, locked, windows-latest)	3m 27s
checks / test (3.12, lowest-direct, windows-latest)	3m 41s
checks / test (3.11, lowest-direct, ubuntu-latest)	59s
checks / test (3.13, locked, windows-latest)	2m 20s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.14, locked, ubuntu-latest)	2m 22s
checks / test (3.11, locked, windows-latest)	2m 31s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 19s
checks / test (3.14, lowest-direct, windows-latest)	2m 33s
checks / test (3.13, lowest-direct, windows-latest)	2m 39s
checks / test (3.11, lowest-direct, windows-latest)	3m 4s
checks / test (3.14, locked, windows-latest)	3m 32s
checks / test (3.10, lowest-direct, ubuntu-latest)	53s
all-green	4s
	40m 38s

Provide feedback