Fix operationId of /current_weather in api spec

[ubergesundheit]

I was seeing

Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 1, Warning count: 0
Errors: 
    -attribute paths.'/current_weather'(get).operationId is repeated

    at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:480)
    at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:507)
    at org.openapitools.codegen.cmd.Generate.execute(Generate.java:423)
    at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
    at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:61)

[jdemaeyer]

Oops, thanks!