chore: fix typos (open-telemetry#844)

Author: mayurkale22

packages/opentelemetry-plugin-express/src/types.ts

@@ -87,7 +87,7 @@ export type IgnoreMatcher = string | RegExp | ((name: string) => boolean);
  * Options available for the Express Plugin (see [documentation](https://github.com/open-telemetry/opentelemetry-js/tree/master/packages/opentelemetry-plugin-express#express-plugin-options))
  */
 export interface ExpressPluginConfig extends PluginConfig {
-  /** Ingore specific based on their name */
+  /** Ignore specific based on their name */
   ignoreLayers?: IgnoreMatcher[];
   /** Ignore specific layers based on their type */
   ignoreLayersType?: ExpressLayerType[];

packages/opentelemetry-plugin-xml-http-request/src/xhr.ts

@@ -94,7 +94,7 @@ export class XMLHttpRequestPlugin extends BasePlugin<XMLHttpRequest> {
   }
 
   /**
-   * checks if trace headers shoudl be propagated
+   * checks if trace headers should be propagated
    * @param spanUrl
    * @private
    */