Update yew requirement from 0.20.0 to 0.21.0

Updates the requirements on [yew](https://github.com/yewstack/yew) to permit the latest version.
- [Release notes](https://github.com/yewstack/yew/releases)
- [Changelog](https://github.com/yewstack/yew/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yewstack/yew/compare/yew-v0.20.0...yew-v0.21.0)

---
updated-dependencies:
- dependency-name: yew
  dependency-type: direct:production
...

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

candle-wasm-examples/llama2-c/Cargo.toml

@@ -32,7 +32,7 @@ wasm-bindgen = "0.2.87"
 wasm-bindgen-futures = "0.4.37"
 wasm-logger = "0.2"
 yew-agent = "0.2.0"
-yew = { version = "0.20.0", features = ["csr"] }
+yew = { version = "0.21.0", features = ["csr"] }
 
 [dependencies.web-sys]
 version = "0.3.64"

candle-wasm-examples/whisper/Cargo.toml

@@ -32,7 +32,7 @@ wasm-bindgen = "0.2.87"
 wasm-bindgen-futures = "0.4.37"
 wasm-logger = "0.2"
 yew-agent = "0.2.0"
-yew = { version = "0.20.0", features = ["csr"] }
+yew = { version = "0.21.0", features = ["csr"] }
 
 [dependencies.web-sys]
 version = "0.3.64"

candle-wasm-examples/yolo/Cargo.toml

@@ -32,7 +32,7 @@ wasm-bindgen = "0.2.87"
 wasm-bindgen-futures = "0.4.37"
 wasm-logger = "0.2"
 yew-agent = "0.2.0"
-yew = { version = "0.20.0", features = ["csr"] }
+yew = { version = "0.21.0", features = ["csr"] }
 
 [dependencies.web-sys]
 version = "0.3.64"