feat: downgrade openapi spec to v3.0.3

[35C4n0r]

Description

In https://github.com/35C4n0r/agentapi-sdk-go, the tool openapi-codegen is only compatible with openapi-3.0.

ref: coder/agentapi-sdk-go#1
ref: #59 (comment)

[github-actions]

✅ Preview binaries are ready!

To test with modules: agentapi_version = "agentapi_121" or download from: https://github.com/coder/agentapi/releases/tag/agentapi_121

[johnstcn]

This is the recommendation from running oapi-codegen:

$ go run github.com/oapi-codegen/oapi-codegen/v2/cmd/[email protected]     -package gen     -generate types,client     -o api.gen.go     openapi-3.0.json
WARNING: You are using an OpenAPI 3.1.x specification, which is not yet supported by oapi-codegen (https://github.com/oapi-codegen/oapi-codegen/issues/373) and so some functionality may not be available. Until oapi-codegen supports OpenAPI 3.1, it is recommended to downgrade your spec to 3.0.x

It doesn't look like updated support will be coming any time soon.