fix(ashby): update nango.yaml (#129)

## Describe your changes
- update nango.yaml to match
```
path: /candidates
group: Candidates
```

## Issue ticket number and link

## Checklist before requesting a review (skip if just adding/editing
APIs & templates)

-   [ ] I added tests, otherwise the reason is:
-   [ ] External API requests have `retries`
-   [ ] Pagination is used where appropriate
- [ ] The built in `nango.paginate` call is used instead of a `while
(true)` loop
- [ ] Third party requests are NOT parallelized (this can cause issues
with rate limits)
- [ ] If a sync requires metadata the `nango.yaml` has `auto_start:
false`
-   [ ] If the sync is a `full` sync then `track_deletes: true` is set
- [ ] I followed the best practices and guidelines from the [Writing
Integration
Scripts](/NangoHQ/integration-templates/blob/main/WRITING_INTEGRATION_SCRIPTS.md)
doc

flows.yaml

@@ -604,7 +604,7 @@ integrations:
                     Action to update history an application stage.
                 endpoint:
                     method: POST
-                    path: /candidates/create
+                    path: /candidates
                     group: Candidates
                 scopes:
                     - candidatesWrite

integrations/ashby/nango.yaml

@@ -89,7 +89,7 @@ integrations:
                     Action to update history an application stage.
                 endpoint:
                     method: POST
-                    path: /candidates/create
+                    path: /candidates
                     group: Candidates
                 scopes:
                     - candidatesWrite