Update slack-sdk requirement in /src/weekly-post

Updates the requirements on [slack-sdk](https://github.com/slackapi/python-slack-sdk) to permit the latest version.
- [Release notes](https://github.com/slackapi/python-slack-sdk/releases)
- [Commits](https://github.com/slackapi/python-slack-sdk/compare/v3.42.0...v3.43.0)

---
updated-dependencies:
- dependency-name: slack-sdk
  dependency-version: 3.43.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/deploy.yaml

@@ -84,7 +84,7 @@ jobs:
       # has been bootstrapped (see README).
       - name: Configure AWS credentials
         if: ${{ steps.rel.outputs.release == 'true' && steps.rel.outputs.kind != 'patch' && vars.RELEASE_NOTIFY_INVOKE_ROLE_ARN != '' }}
-        uses: aws-actions/configure-aws-credentials@517a711dbcd0e402f90c77e7e2f81e849156e31d # v6
+        uses: aws-actions/configure-aws-credentials@254c19bd240aabef8777f48595e9d2d7b972184b # v6
         with:
           role-to-assume: ${{ vars.RELEASE_NOTIFY_INVOKE_ROLE_ARN }}
           aws-region: us-east-1

src/ring-scheduler/requirements.txt

@@ -1,2 +1,2 @@
-boto3>=1.43.43
+boto3>=1.43.38
 requests>=2.34.2