Update libraries.md (#5465)

Author: techerfan

content/en/docs/concepts/instrumentation/libraries.md

@@ -341,7 +341,7 @@ There might be some exceptions where you don't need to propagate context:
   context propagation in addition to active spans.
   - Put spans (trace context) created by library in the context explicitly,
     document how to access it.
-  - Alow users to pass trace context in your context.
+  - Allow users to pass trace context in your context.
 - Within the library, propagate trace context explicitly. Active spans might
   change during callbacks.
   - Capture active context from users on the public API surface as soon as you