deps: bump base64 from 0.22.1 to 0.23.1

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.22.1 to 0.23.1.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](https://github.com/marshallpierce/rust-base64/compare/v0.22.1...v0.23.1)

---
updated-dependencies:
- dependency-name: base64
  dependency-version: 0.23.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

apps/fieldcraft-web/Cargo.toml

@@ -31,4 +31,4 @@ wasm-bindgen-futures = "0.4"
 js-sys = "0.3"
 web-sys = { version = "0.3", features = ["Window", "Document", "Element", "HtmlElement", "HtmlCanvasElement", "HtmlAnchorElement", "Blob", "BlobPropertyBag", "Url", "Location", "DomTokenList", "CssStyleDeclaration", "Event", "EventTarget", "BeforeUnloadEvent", "Storage", "Crypto", "Headers", "Request", "RequestInit", "RequestCache", "Response"] }
 # Autosaves kept in the browser's local storage, which holds text.
-base64 = "0.22"
+base64 = "0.23"