Update using-vetkeys.mdx

docs/developer-docs/smart-contracts/encryption/using-vetkeys.mdx

@@ -12,8 +12,6 @@ import { MarkdownChipRow } from "/src/components/Chip/MarkdownChipRow";
 
 <MarkdownChipRow labels={["Advanced", "Tutorial"]} />
 
-
-
 This demo provides a canister (`src/system_api`) that offers the [proposed vetKD system API](https://github.com/dfinity/interface-spec/pull/158), implemented demonstration, testing, and initial development purposes. We stress that it does not offer security yet as no threshold cryptography is used yet to secure the key.
 
 This demo uses files found in [this repository](https://github.com/dfinity/examples/tree/master/rust/vetkd).
@@ -37,7 +35,7 @@ cd examples/motoko/vetkd
 
 </TabItem>
 
-<TabItem value="rust" label="rust" default>
+<TabItem value="rust" label="Rust" default>
 
 ```
 git clone https://github.com/dfinity/examples/