Mention 'wasm-unsafe-eval' in the CSP documentation. (#3238)

Author: TimNN

src/content/docs/security/csp.mdx

@@ -36,6 +36,11 @@ example of Tauri, but every application developer needs to tailor this to their
       },
 ```
 
+:::tip
+When using Rust to develop your frontend, or if your frontend otherwise uses WebAssembly, remember
+to include `'wasm-unsafe-eval'` as a `script-src`.
+:::
+
 See [`script-src`], [`style-src`] and [CSP Sources] for more
 information about this protection.