fix some typos (#2744)

Co-authored-by: Rob Ede <robjtede@icloud.com>

actix-web/Cargo.toml

@@ -59,7 +59,7 @@ rustls = ["actix-http/rustls", "actix-tls/accept", "actix-tls/rustls"]
 # Don't rely on these whatsoever. They may disappear at anytime.
 __compress = []
 
-# io-uring feature only avaiable for Linux OSes.
+# io-uring feature only available for Linux OSes.
 experimental-io-uring = ["actix-server/io-uring"]
 
 [dependencies]

actix-web/src/types/either.rs

@@ -49,7 +49,7 @@ use crate::{
 /// ```
 ///
 /// # Responder
-/// It may be desireable to use a concrete type for a response with multiple branches. As long as
+/// It may be desirable to use a concrete type for a response with multiple branches. As long as
 /// both types implement `Responder`, so will the `Either` type, enabling it to be used as a
 /// handler's return type.
 ///

awc/src/builder.rs

@@ -165,7 +165,7 @@ where
 
     /// Add default header.
     ///
-    /// Headers added by this method get added to every request unless overriden by .
+    /// Headers added by this method get added to every request unless overridden by other methods.
     ///
     /// # Panics
     /// Panics if header name or value is invalid.