Update all IIIF URIs to conform to recommended URI patterns

arkindex/documents/api/iiif.py

arkindex/documents/serializers/iiif/__init__.py

arkindex/documents/serializers/iiif/annotations.py

arkindex/documents/serializers/iiif/manifests.py

arkindex/documents/serializers/search.py

arkindex/documents/tests/test_annotation_list.py

arkindex/documents/tests/test_manifest.py

arkindex/documents/tests/test_search.py

arkindex/project/api_v1.py

arkindex/project/settings.py

openapi/patch.yml