Libs(ruby): expose patch endpoints (#1264)

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## Motivation

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problem
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I've noticed that the `patch` endpoints, which were introduced back in
[v1.6.0](https://github.com/svix/svix-webhooks/releases/tag/v1.6.0),
aren't currently exposed in the way they should be. This omission can
lead to errors when users attempt to utilize these `patch` endpoints,
particularly when building request bodies for endpoint resources. A case
in point is the `Svix::EndpointPatch` error, which serves as an
illustrative example of the underlying issue:

```
irb(main):001:0> Svix::EndpointPatch.new({})
(irb):1:in `<main>': uninitialized constant Svix::EndpointPatch (NameError)

Svix::EndpointPatch.new({})
    ^^^^^^^^^^^^^^^
Did you mean?  Svix::EndpointUpdate
               Svix::EndpointOut
               Svix::EndpointAPI
```

## Solution

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the code change.
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To address this issue, I propose to expose the `patch` endpoints within
the `ruby/lib/svix.rb` file.

ruby/lib/svix.rb

@@ -20,6 +20,7 @@
 require "svix/models/app_portal_access_out"
 require "svix/models/application_in"
 require "svix/models/application_out"
+require "svix/models/application_patch"
 require "svix/models/dashboard_access_out"
 require "svix/models/endpoint_created_event_data"
 require "svix/models/endpoint_created_event"
@@ -37,13 +38,15 @@
 require "svix/models/endpoint_update"
 require "svix/models/endpoint_updated_event_data"
 require "svix/models/endpoint_updated_event"
+require "svix/models/endpoint_patch"
 require "svix/models/event_example_in"
 require "svix/models/event_type_import_open_api_in"
 require "svix/models/event_type_import_open_api_out"
 require "svix/models/event_type_import_open_api_out_data"
 require "svix/models/event_type_in"
 require "svix/models/event_type_out"
 require "svix/models/event_type_update"
+require "svix/models/event_type_patch"
 require "svix/models/http_error_out"
 require "svix/models/http_validation_error"
 require "svix/models/integration_in"