Docs: Fix some typos in connection-checking.yml (airbytehq#17028)

Fixes some formatting issues and hopefully makes the guide slightly easier to follow.

docs/connector-development/tutorials/cdk-tutorial-python-http/connection-checking.md

@@ -4,7 +4,7 @@ The second operation in the Airbyte Protocol that we'll implement is the `check`
 
 This operation verifies that the input configuration supplied by the user can be used to connect to the underlying data source. Note that this user-supplied configuration has the values described in the `spec.yaml` filled in. In other words if the `spec.yaml` said that the source requires a `username` and `password` the config object might be `{ "username": "airbyte", "password": "password123" }`. You should then implement something that returns a json object reporting, given the credentials in the config, whether we were able to connect to the source.
 
-In order to make requests the API, we need to specify the access 
+In order to make requests to the API, we need to specify the access. 
 In our case, this is a fairly trivial check since the API requires no credentials. Instead, let's verify that the user-input `base` currency is a legitimate currency. In `source.py` we'll find the following autogenerated source:
 
 ```python