Bump base64 from 0.13.1 to 0.22.1

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.13.1 to 0.22.1.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.13.1...v0.22.1)

---
updated-dependencies:
- dependency-name: base64
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -18,7 +18,7 @@ userspace = []
 [dependencies]
 acpi = "5.0.0"
 aml = "0.16.4"
-base64 = { version = "0.13.1", default-features = false }
+base64 = { version = "0.22.1", default-features = false }
 bit_field = "0.10.2"
 bootloader = { version = "0.9.29", features = ["map_physical_memory"] }
 lazy_static = { version = "1.4.0", features = ["spin_no_std"] }