update dependencies to latest versions

- askama: 0.11.0 -> 0.15.4
- clap: 3.0.5 -> 4.5.55
- comrak: 0.13.0 -> 0.50.0
- miette: 4.2.1 -> 7.6.0
- notify: 4.0.17 -> 8.2.0
- serde: 1.0.133 -> 1.0.228
- thiserror: 1.0.30 -> 2.0.18
- tinytemplate: 1.1 -> 1.2.1
- toml: 0.5.8 -> 0.9.11

Breaking changes addressed:
- clap: ArgEnum -> ValueEnum, removed parse(from_os_str)
- comrak: renamed option structs, unsafe_ -> unsafe
- miette: NamedSource now requires generic parameter
- notify: new recommended_watcher API
- toml: to_vec removed, use to_string instead

Author: dannywillems