Bump base64 from 0.22.1 to 0.23.1 in /python/rust

[dependabot]

Bumps base64 from 0.22.1 to 0.23.1.

Changelog

Sourced from base64's changelog.

0.23.1

• Make the tests build again on non-SIMD architectures

0.23.0

• Added more consts for preconfigured configs and engines
• Make DecodeError::InvalidLastSymbol more clear by including the decoded value
• Added SIMD-accelerated engines behind the default-on simd-unsafe feature: Simd picks the best instruction set at runtime (AVX2 on x86_64, NEON on aarch64) and falls back to the scalar GeneralPurpose engine, while Avx2 and Neon target one instruction set with no runtime detection and work in no_std. The engines support the standard and URL-safe alphabets.
• Update MSRV to 1.71.0
• Add support for custom padding symbols

Commits

• 069bf70 v0.23.1
• 6ab1fb0 Merge pull request #310 from musicinmybrain/test-on-non-simd-arches
• 7cffce6 Fix testing on architectures without unsafe SIMD support
• e34f9a0 Merge pull request #308 from atouchet/com
• e9240c9 Remove outdated comment
• 9e9220a v0.23.0
• 870326e Merge pull request #306 from marshallpierce/mp/trailing-bits-docs
• fbec5f1 Document no trailing trailing bits
• 0a23549 Merge pull request #305 from marshallpierce/mp/edition-2021
• f10b7e2 Update deps & edition
• Additional commits viewable in compare view

[dependabot]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.