Fix typos and spelling errors. (#8639)

changelog.d/8639.misc

docs/sample_config.yaml

docs/sample_log_config.yaml

synapse/config/jwt_config.py

synapse/config/logger.py

synapse/config/registration.py

synapse/config/room_directory.py

synapse/config/tracer.py

synapse/crypto/context_factory.py

synapse/events/__init__.py

synapse/events/utils.py

synapse/groups/attestations.py

synapse/groups/groups_server.py

synapse/handlers/admin.py

synapse/handlers/auth.py

synapse/handlers/federation.py

synapse/handlers/groups_local.py

synapse/handlers/message.py

synapse/handlers/oidc_handler.py

synapse/handlers/presence.py