Update base64 requirement from 0.21.0 to 0.22.1

---
updated-dependencies:
- dependency-name: base64
  dependency-version: 0.22.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -24,7 +24,7 @@ codegen = { version = "0.2.0", optional = true }
 edge-gpt = { version = "0.3.3", optional = true }
 hmac = { version = "0.12.1", optional = true }
 md-5 = { version = "0.10.5", optional = true }
-base64 = { version = "0.21.0", optional = true }
+base64 = { version = "0.22.1", optional = true }
 uuid = { version = "1.3.2", features = ["v4"], optional = true }
 sentencepiece = { version = "0.11.1", optional = true }
 model-manager = { git = "https://github.com/JustFrederik/model_manager.git", rev = "aee991c", optional = true }