fixes #25

[GavinChenYan]

As long as user properly handle and close any associated resources, such as the input stream, there should not be a memory leak issue.

However, , if user app repeatedly execute this code without properly closing the input stream or if there are other components in your application that are not releasing resources correctly, it could lead to memory leaks over time.

We need to ensure proper handling of resources and avoid memory leaks,

[stevehu]

we should put this line into the finally block. Or just use the try with the resource.

[GavinChenYan]

I tried to use try block like this:
try (InputStream in = this.getClass().getClassLoader().getResourceAsStream(OPENAPI_YAML_CONFIG)) {
if (in == null) {
in = this.getClass().getClassLoader().getResourceAsStream(OPENAPI_YML_CONFIG);
if (in == null) {
throw new IOException("Cannot load OpenAPI spec file");
}
}
spec = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8))
.lines()
.collect(Collectors.joining("\n"));
openApiHelper = new OpenApiHelper(spec);
schemaValidator = new SchemaValidator(openApiHelper.openApi3);
} catch (Exception e) {
logger.error("Initialization failed: " + e);
}

But it is error since try block will set the in (inputstream) as final and cannot load it again.

So I am going to change it to finally block