fix(blog): fix blog post linting issue

[chenrui333]

seeing linting failures in https://github.com/runatlantis/atlantis/actions/runs/9571798324/job/26389710489?pr=4683

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$ markdownlint-cli2  runatlantis.io/**/*.md
markdownlint-cli2 v0.13.0 (markdownlint v0.34.0)
Finding: runatlantis.io/blog.md runatlantis.io/blog/2017/introducing-atlantis.md runatlantis.io/blog/2018/atlantis-0-4-4-now-supports-bitbucket.md runatlantis.io/blog/2018/hosting-our-static-site-over-ssl-with-s3-acm-cloudfront-and-terraform.md runatlantis.io/blog/2018/joining-hashicorp.md runatlantis.io/blog/2018/putting-the-dev-into-devops-why-your-developers-should-write-terraform-too.md runatlantis.io/blog/2018/terraform-and-the-dangers-of-applying-locally.md runatlantis.io/blog/2019/4-reasons-to-try-hashicorps-new-free-terraform-remote-state-storage.md runatlantis.io/blog/2024/april-2024-survey-results.md runatlantis.io/blog/2024/integrating-atlantis-with-opentofu.md runatlantis.io/contributing.md runatlantis.io/contributing/events-controller.md runatlantis.io/contributing/glossary.md runatlantis.io/docs.md runatlantis.io/docs/access-credentials.md runatlantis.io/docs/api-endpoints.md runatlantis.io/docs/apply-requirements.md runatlantis.io/docs/automerging.md runatlantis.io/docs/autoplanning.md runatlantis.io/docs/checkout-strategy.md runatlantis.io/docs/command-requirements.md runatlantis.io/docs/configuring-atlantis.md runatlantis.io/docs/configuring-webhooks.md runatlantis.io/docs/custom-policy-checks.md runatlantis.io/docs/custom-workflows.md runatlantis.io/docs/deployment.md runatlantis.io/docs/faq.md runatlantis.io/docs/how-atlantis-works.md runatlantis.io/docs/installation-guide.md runatlantis.io/docs/locking.md runatlantis.io/docs/policy-checking.md runatlantis.io/docs/post-workflow-hooks.md runatlantis.io/docs/pre-workflow-hooks.md runatlantis.io/docs/provider-credentials.md runatlantis.io/docs/repo-level-atlantis-yaml.md runatlantis.io/docs/requirements.md runatlantis.io/docs/security.md runatlantis.io/docs/server-configuration.md runatlantis.io/docs/server-side-repo-config.md runatlantis.io/docs/stats.md runatlantis.io/docs/streaming-logs.md runatlantis.io/docs/terraform-cloud.md runatlantis.io/docs/terraform-versions.md runatlantis.io/docs/troubleshooting-https.md runatlantis.io/docs/upgrading-atlantis-yaml.md runatlantis.io/docs/using-atlantis.md runatlantis.io/docs/using-slack-hooks.md runatlantis.io/docs/webhook-secrets.md runatlantis.io/guide.md runatlantis.io/guide/test-drive.md runatlantis.io/guide/testing-locally.md runatlantis.io/index.md
Linting: 52 file(s)
Summary: 0 error(s)