fix: always allow schema string examples (asyncapi#1007)

Co-authored-by: Jonas Lagoni <[email protected]>

fix: update operationMessagesUnambiguity rule validity check (asyncap…

…i#1038)

fix: update @asyncapi/protobuf-schema-parser to 3.3.0 version and oth…

…ers (asyncapi#1069)

fix: update @asyncapi/protobuf-schema-parser to 3.2.15 version and ot…

…hers (asyncapi#1068)