cargo: bump the minor group with 2 updates

Bumps the minor group with 2 updates: [pulldown-cmark](https://github.com/raphlinus/pulldown-cmark) and [tokio](https://github.com/tokio-rs/tokio).


Updates `pulldown-cmark` from 0.9.5 to 0.10.0
- [Release notes](https://github.com/raphlinus/pulldown-cmark/releases)
- [Commits](pulldown-cmark/pulldown-cmark@v0.9.5...v0.10.0)

Updates `tokio` from 1.35.1 to 1.36.0
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.35.1...tokio-1.36.0)

---
updated-dependencies:
- dependency-name: pulldown-cmark
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: tokio
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

Signed-off-by: dependabot[bot] <[email protected]>

mdbook-exerciser/Cargo.toml

@@ -12,4 +12,4 @@ anyhow = "1.0.79"
 log = "0.4.17"
 mdbook = "0.4.25"
 pretty_env_logger = "0.5.0"
-pulldown-cmark = { version = "0.9.5", default-features = false }
+pulldown-cmark = { version = "0.10.0", default-features = false }

src/exercises/concurrency/chat-async/Cargo.toml

@@ -6,5 +6,5 @@ edition = "2021"
 [dependencies]
 futures-util = { version = "0.3.30", features = ["sink"] }
 http = "1.0.0"
-tokio = { version = "1.28.1", features = ["full"] }
+tokio = { version = "1.36.0", features = ["full"] }
 tokio-websockets = { version = "0.5.1", features = ["client", "fastrand", "server", "sha1_smol"] }