fix spelling of word 'recommendation'

this PR fixes the spelling error for the word 'recommendation'

Author: joshlong

spring-web/src/main/java/org/springframework/http/HttpHeaders.java

@@ -61,6 +61,7 @@
  * @author Sebastien Deleuze
  * @author Brian Clozel
  * @author Juergen Hoeller
+ * @author Josh Long
  * @since 3.0
  */
 public class HttpHeaders implements MultiValueMap<String, String>, Serializable {
@@ -94,42 +95,42 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	public static final String ACCEPT_RANGES = "Accept-Ranges";
 	/**
 	 * The CORS {@code Access-Control-Allow-Credentials} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_ALLOW_CREDENTIALS = "Access-Control-Allow-Credentials";
 	/**
 	 * The CORS {@code Access-Control-Allow-Headers} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_ALLOW_HEADERS = "Access-Control-Allow-Headers";
 	/**
 	 * The CORS {@code Access-Control-Allow-Methods} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_ALLOW_METHODS = "Access-Control-Allow-Methods";
 	/**
 	 * The CORS {@code Access-Control-Allow-Origin} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_ALLOW_ORIGIN = "Access-Control-Allow-Origin";
 	/**
 	 * The CORS {@code Access-Control-Expose-Headers} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_EXPOSE_HEADERS = "Access-Control-Expose-Headers";
 	/**
 	 * The CORS {@code Access-Control-Max-Age} response header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_MAX_AGE = "Access-Control-Max-Age";
 	/**
 	 * The CORS {@code Access-Control-Request-Headers} request header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_REQUEST_HEADERS = "Access-Control-Request-Headers";
 	/**
 	 * The CORS {@code Access-Control-Request-Method} request header field name.
-	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommandation</a>
+	 * @see <a href="http://www.w3.org/TR/cors/">CORS W3C recommendation</a>
 	 */
 	public static final String ACCESS_CONTROL_REQUEST_METHOD = "Access-Control-Request-Method";
 	/**