Repository: PrefectHQ/prefect-aws (python)

Issue:
boto3 client use_ssl wrong default
<!-- Thanks for submitting an issue! Please describe the issue. -->

Regression from 0.4.0 to 0.4.1 due to https://github.com/PrefectHQ/prefect-aws/pull/322.

A push_to_s3 step on v0.4.0 will successfully upload to a SSL only S3 bucket.

on v0.4.1 it fails with 
```
raise S3UploadFailedError(
boto3.exceptions.S3UploadFailedError: Failed to upload <...>/flow.py: An error occurred (AccessDenied) when calling the PutObject operation: Access Denied
```

This is most likely due to the use_ssl parameter default `None` in https://github.com/PrefectHQ/prefect-aws/blob/c4939d76c8868c98a187fad47da4a09c1e11121f/prefect_aws/deployments/steps.py#L223C5-L223C12 which contradicts the boto3 client default 'True' https://boto3.amazonaws.com/v1/documentation/api/latest/reference/core/session.html#boto3.session.Session.client

- [x] I would like to [help contribute](https://PrefectHQ.github.io/prefect-aws/#contributing) a pull request to resolve this!


Pull request description:
fix ssl default
<!-- Thanks for contributing 🎉! Please ensure the title neatly summarizes the proposed changes. -->

<!-- Overview -->

Closes #327

The boto3 client parameter `use_ssl` defaults to `True`. Setting it to `None` here contradicts the default and causes uploads to SSL-only buckets to fail.
Allowing SSL only on S3 is AWS best practice https://docs.aws.amazon.com/AmazonS3/latest/userguide/security-best-practices.html and therefore, this should work without the need to explicitly set use_ssl to true in the client parameters.

### Checklist
<!-- These boxes may be checked after opening the pull request. -->

- [x] References any related issue by including "Closes #<Issue Number>" or "Closes <Issue URL>".
  - If no issue exists and your change is not a small fix, please [create an issue](https://github.com/PrefectHQ/prefect-aws/issues/new/choose) first.
- [x] Includes tests or only affects documentation.
- [x] Passes `pre-commit` checks.
  - Run `pre-commit install && pre-commit run --all` locally for formatting and linting.
- [ ] Includes screenshots of documentation updates.
  - Run `mkdocs serve` view documentation locally.
- [x] Summarizes PR's changes in [CHANGELOG.md](https://github.com/PrefectHQ/prefect-aws/blob/main/CHANGELOG.md)


Patch:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec431ba..d6d86da 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+## 0.4.2
+
+Released November 6th, 2023.
+
+### Fixed
+
+- Fixed use_ssl default for s3 client.
+
 ## 0.4.1
 
 Released October 13th, 2023.
diff --git a/prefect_aws/deployments/steps.py b/prefect_aws/deployments/steps.py
index 7793046..7525a5e 100644
--- a/prefect_aws/deployments/steps.py
+++ b/prefect_aws/deployments/steps.py
@@ -220,7 +220,7 @@ def get_s3_client(
     aws_client_parameters = credentials.get("aws_client_parameters", client_parameters)
     api_version = aws_client_parameters.get("api_version", None)
     endpoint_url = aws_client_parameters.get("endpoint_url", None)
-    use_ssl = aws_client_parameters.get("use_ssl", None)
+    use_ssl = aws_client_parameters.get("use_ssl", True)
     verify = aws_client_parameters.get("verify", None)
     config_params = aws_client_parameters.get("config", {})
     config = Config(**config_params)


Test patch:
diff --git a/tests/deploments/test_steps.py b/tests/deploments/test_steps.py
index c78c357..22608bd 100644
--- a/tests/deploments/test_steps.py
+++ b/tests/deploments/test_steps.py
@@ -228,7 +228,7 @@ def test_s3_session_with_params():
         assert {
             "api_version": "v1",
             "endpoint_url": None,
-            "use_ssl": None,
+            "use_ssl": True,
             "verify": None,
         }.items() <= all_calls[1].kwargs.items()
         assert all_calls[1].kwargs.get("config").connect_timeout == 300
@@ -244,7 +244,7 @@ def test_s3_session_with_params():
         assert {
             "api_version": None,
             "endpoint_url": None,
-            "use_ssl": None,
+            "use_ssl": True,
             "verify": None,
         }.items() <= all_calls[3].kwargs.items()
         assert all_calls[3].kwargs.get("config").connect_timeout == 60