Fix typos in header.js

packages/components/header/header.js

@@ -72,7 +72,7 @@ class Header {
    *
    * Closes the mobile menu and updates accessibility state.
    *
-   * Remvoes the margin-bottom from the navigation
+   * Removes the margin-bottom from the navigation
    */
   closeMobileMenu() {
     this.menuIsOpen = false
@@ -115,7 +115,7 @@ class Header {
     this.navigation.style.marginBottom = `${marginBody}px`
     this.mobileMenuToggleButton.setAttribute('aria-expanded', 'true')
 
-    // add event listerer for esc key to close menu
+    // add event listener for esc key to close menu
     document.addEventListener('keydown', this.handleEscapeKey.bind(this))
 
     // add event listener for close icon to close menu
@@ -145,7 +145,7 @@ class Header {
    * If the available space is greater than the current breakpoint,
    * remove the mobile menu toggle button and move the first item in the
    *
-   * Additionaly will close the mobile menu if the window gets resized
+   * Additionally will close the mobile menu if the window gets resized
    * and the menu is open.
    */