fix(deps): update rust crate strum to 0.28 (#522)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [strum](https://redirect.github.com/Peternator7/strum) | dependencies
| minor | `0.27` → `0.28` |

---

### Release Notes

<details>
<summary>Peternator7/strum (strum)</summary>

###
[`v0.28.0`](https://redirect.github.com/Peternator7/strum/blob/HEAD/CHANGELOG.md#0280)

[Compare
Source](https://redirect.github.com/Peternator7/strum/compare/v0.27.2...v0.28.0)

- [#&#8203;461](https://redirect.github.com/Peternator7/strum/pull/461):
Allow any kind of passthrough attributes on `EnumDiscriminants`.
- Previously only list-style attributes (e.g.
`#[strum_discriminants(derive(...))]`) were supported. Now path-only
(e.g. `#[strum_discriminants(non_exhaustive)]`) and name/value (e.g.
`#[strum_discriminants(doc = "foo")]`)
    attributes are also supported.

- [#&#8203;462](https://redirect.github.com/Peternator7/strum/pull/462):
Add missing `#[automatically_derived]` to generated impls not
covered by
[#&#8203;444](https://redirect.github.com/Peternator7/strum/pull/444).

- [#&#8203;466](https://redirect.github.com/Peternator7/strum/pull/466):
Bump MSRV to 1.71, required to keep up with updated `syn` and
`windows-sys` dependencies. This is a breaking change if you're on an
old version of rust.

- [#&#8203;469](https://redirect.github.com/Peternator7/strum/pull/469):
Use absolute paths in generated proc macro code to avoid
  potential name conflicts.

- [#&#8203;465](https://redirect.github.com/Peternator7/strum/pull/465):
Upgrade `phf` dependency to v0.13.

- [#&#8203;473](https://redirect.github.com/Peternator7/strum/pull/473):
Fix `cargo fmt` / `clippy` issues and add GitHub Actions CI.

- [#&#8203;477](https://redirect.github.com/Peternator7/strum/pull/477):
`strum::ParseError` now implements `core::fmt::Display` instead
`std::fmt::Display` to make it `#[no_std]` compatible. Note the `Error`
trait wasn't available in core until `1.81`
  so `strum::ParseError` still only implements that in std.

- [#&#8203;476](https://redirect.github.com/Peternator7/strum/pull/476):
**Breaking Change** - `EnumString` now implements `From<&str>`
(infallible) instead of `TryFrom<&str>` when the enum has a
`#[strum(default)]` variant. This more accurately
reflects that parsing cannot fail in that case. If you need the old
`TryFrom` behavior, you can opt back in using
  `parse_error_ty` and `parse_error_fn`:

  ```rust
  #[derive(EnumString)]
#[strum(parse_error_ty = strum::ParseError, parse_error_fn =
make_error)]
  pub enum Color {
      Red,
      #[strum(default)]
      Other(String),
  }

  fn make_error(x: &str) -> strum::ParseError {
      strum::ParseError::VariantNotFound
  }
  ```

- [#&#8203;431](https://redirect.github.com/Peternator7/strum/pull/431):
Fix bug where `EnumString` ignored the `parse_err_ty`
  attribute when the enum had a `#[strum(default)]` variant.

- [#&#8203;474](https://redirect.github.com/Peternator7/strum/pull/474):
EnumDiscriminants will now copy `default` over from the
  original enum to the Discriminant enum.

  ```rust
  #[derive(Debug, Default, EnumDiscriminants)]
  #[strum_discriminants(derive(Default))] // <- Remove this in 0.28.
  enum MyEnum {
      #[default] // <- Will be the #[default] on the MyEnumDiscriminant
      #[strum_discriminants(default)] // <- Remove this in 0.28
      Variant0,
      Variant1 { a: NonDefault },
  }
  ```

</details>

---

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Cargo.lock

@@ -33,7 +33,7 @@ regex = "1"
 roff = { version = "0.2", optional = true }
 serde = { version = "1", features = ["derive"] }
 shell-words = "1"
-strum = { version = "0.27", features = ["derive"] }
+strum = { version = "0.28", features = ["derive"] }
 tera = { version = "1", optional = true }
 thiserror = "2"
 versions = "7"