Fix deprecation of dict method by using model_dump as suggested (#378)

* Move IssueInfo.data initialization from __post_init_post_parse__ to _get_input_()

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Fix author-affiliation parsing

* PydanticDeprecatedSince20: The  method is deprecated; use  instead

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: erogluorhan

.github/workflows/collect-user-submission.py

@@ -77,6 +77,6 @@ def _create_submission_input(self):
 
 if __name__ == '__main__':
     issue = IssueInfo(gh_event_path=os.environ['GITHUB_EVENT_PATH']).create_submission()
-    inputs = issue.submission.dict()
+    inputs = issue.submission.model_dump()
     with open('resource-gallery-submission-input.json', 'w') as f:
         json.dump(inputs, f)