anchor-v0.30.1

anchor: Use Rust 1.79

Building with Rust 1.80 fails with:

```
 error[E0282]: type annotations needed for `Box<_>`
  --> /Users/runner/.cargo/registry/src/index.crates.io-6f17d22bba15001f/time-0.3.29/src/format_description/parse/mod.rs:83:9
   |
83 |     let items = format_items
   |         ^^^^^
...
86 |     Ok(items.into())
   |              ---- type must be known at this point
   |
help: consider giving `items` an explicit type, where the placeholders `_` are specified
   |
83 |     let items: Box<_> = format_items
   |              ++++++++
```