build(deps): bump markdown from 3.7 to 3.8 in /docs (#3312)

Bumps [markdown](https://github.com/Python-Markdown/markdown) from 3.7 to 3.8.
- [Release notes](https://github.com/Python-Markdown/markdown/releases)
- [Changelog](https://github.com/Python-Markdown/markdown/blob/master/docs/changelog.md)
- [Commits](https://github.com/Python-Markdown/markdown/compare/3.7...3.8)

---
updated-dependencies:
- dependency-name: markdown
  dependency-version: '3.8'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/Pipfile.lock

@@ -24,11 +24,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:02a89390c1e15fdfdc0d7c6b25cb3e62650d0494005c97d6f148bf5b9787525e",
+                "sha256:d13b81ad223b890aa16c5471f2ac3056cf76c5f10f82d6f9292f0b415f389000",
-                "sha256:310b41d755445d74569f993ccfc22838295d9fe005425094fad953d7f15c8580"
+                "sha256:e5dd1551894c77868a30651cef00984d50e1002d06942a7101d34870c5f02afd"
             ],
             "markers": "python_version >= '3.9'",
-            "version": "==8.6.1"
+            "version": "==8.7.0"
         },
         "importlib-resources": {
             "hashes": [
@@ -211,12 +211,12 @@
         },
         "markdown": {
             "hashes": [
-                "sha256:2ae2471477cfd02dbbf038d5d9bc226d40def84b4fe2986e49b59b6b472bbed2",
+                "sha256:794a929b79c5af141ef5ab0f2f642d0f7b1872981250230e72682346f7cc90dc",
-                "sha256:7eb6df5690b81a1d7942992c97fad2938e956e79df20cbc6186e9c3a77b1c803"
+                "sha256:7df81e63f0df5c4b24b7d156eb81e4690595239b7d70937d0409f1b0de319c6f"
             ],
             "index": "pypi",
-            "markers": "python_version >= '3.8'",
+            "markers": "python_version >= '3.9'",
-            "version": "==3.7"
+            "version": "==3.8"
         },
         "markupsafe": {
             "hashes": [