Revert PR template, update gitignore, and typos

Author: ghukill

.github/pull-request-template.md

@@ -15,15 +15,5 @@ YES | NO
 ### What are the relevant tickets?
 - Include links to Jira Software and/or Jira Service Management tickets here.
 
-### Developer
-- [ ] All new ENV is documented in README
-- [ ] All new ENV has been added to staging and production environments
-- [ ] All related Jira tickets are linked in commit message(s)
-- [ ] Stakeholder approval has been confirmed (or is not needed)
-
-### Code Reviewer(s)
-- [ ] The commit message is clear and follows our guidelines (not just this PR message)
-- [ ] There are appropriate tests covering any new functionality
-- [ ] The provided documentation is sufficient for understanding any new functionality introduced
-- [ ] Any manual tests have been performed and verified
-- [ ] New dependencies are appropriate or there were no changes
+### Code review
+* Code review best practices are documented [here](https://mitlibraries.github.io/guides/collaboration/code_review.html) and you are encouraged to have a constructive dialogue with your reviewers about their preferences and expectations.

.gitignore

@@ -138,5 +138,6 @@ dmypy.json
 # jetbrains
 .idea/
 
+.arch_tag
 .aws-sam/
 tests/sam/env.json

README.md

@@ -98,7 +98,7 @@ Response:
 
 Note: the lambda is still returning a dictionary that _would_ work for an HTTP response, but when invoked directly it's just a dictionary with the relevant information.
 
-### Troubleshoot
+### Troubleshooting
 
 #### Encounter error `botocore.exceptions.TokenRetrievalError`