Auto merge of #13675 - rust-lang:renovate/base64-0.x, r=epage

chore(deps): update rust crate base64 to 0.22.0

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [base64](https://togithub.com/marshallpierce/rust-base64) | workspace.dependencies | minor | `0.21.7` -> `0.22.0` |

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### Release Notes

<details>
<summary>marshallpierce/rust-base64 (base64)</summary>

### [`v0.22.0`](https://togithub.com/marshallpierce/rust-base64/blob/HEAD/RELEASE-NOTES.md#0220)

[Compare Source](https://togithub.com/marshallpierce/rust-base64/compare/v0.21.7...v0.22.0)

-   `DecodeSliceError::OutputSliceTooSmall` is now conservative rather than precise. That is, the error will only occur if the decoded output *cannot* fit, meaning that `Engine::decode_slice` can now be used with exactly-sized output slices. As part of this, `Engine::internal_decode` now returns `DecodeSliceError` instead of `DecodeError`, but that is not expected to affect any external callers.
-   `DecodeError::InvalidLength` now refers specifically to the *number of valid symbols* being invalid (i.e. `len % 4 == 1`), rather than just the number of input bytes. This avoids confusing scenarios when based on interpretation you could make a case for either `InvalidLength` or `InvalidByte` being appropriate.
-   Decoding is somewhat faster (5-10%)

</details>

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### Configuration

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Author: bors

Cargo.lock

@@ -22,7 +22,7 @@ annotate-snippets = "0.11.1"
 anstream = "0.6.13"
 anstyle = "1.0.6"
 anyhow = "1.0.81"
-base64 = "0.21.7"
+base64 = "0.22.0"
 bytesize = "1.3"
 cargo = { path = "" }
 cargo-credential = { version = "0.4.2", path = "credential/cargo-credential" }