docs: update Kotlin/Wasm to Beta in some missed places (#5173)

Author: bashor

docs/topics/wasm/wasm-js-interop.md

@@ -8,7 +8,7 @@ As with [Kotlin/JS](js-overview.md), the Kotlin/Wasm compiler also has interoper
 familiar with Kotlin/JS interoperability, you can notice that Kotlin/Wasm interoperability is similar. However,
 there are key differences to consider.
 
-> Kotlin/Wasm is [Alpha](components-stability.md). It may be changed at any time. Use it in scenarios before production. 
+> Kotlin/Wasm is [Beta](components-stability.md). It may be changed at any time. Use it in scenarios before production. 
 > We would appreciate your feedback in [YouTrack](https://youtrack.jetbrains.com/issue/KT-56492).
 >
 {style="note"}

docs/topics/wasm/wasm-overview.md

@@ -64,7 +64,7 @@ WASI provides a secure standard interface for running Kotlin applications compil
 
 ## Kotlin/Wasm performance
 
-Although Kotlin/Wasm is still in Alpha, Compose Multiplatform running on Kotlin/Wasm already shows encouraging performance 
+Although Kotlin/Wasm is still in Beta, Compose Multiplatform running on Kotlin/Wasm already shows encouraging performance 
 traits. You can see that its execution speed outperforms JavaScript and is approaching that of the JVM:
 
 ![Kotlin/Wasm performance](wasm-performance-compose.png){width=700}