build(deps): bump base64ct from 1.6.0 to 1.7.3

Bumps [base64ct](https://github.com/RustCrypto/formats) from 1.6.0 to 1.7.3.
- [Commits](https://github.com/RustCrypto/formats/commits)

---
updated-dependencies:
- dependency-name: base64ct
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -16,7 +16,7 @@ edition = "2021"
 rust-version = "1.81"
 
 [dependencies]
-base64ct = { version = "1.4", optional = true }
+base64ct = { version = "1.7", optional = true }
 bytes = { version = "1", optional = true, default-features = false }
 digest = { version = "=0.11.0-pre.9", optional = true, default-features = false }
 pem-rfc7468 = { version = "1.0.0-rc.2", optional = true }