Update @see links for HttpMethods to reference RFC 9110

Replaced outdated references to HTTP 1.1 section links (RFC 2616)
with updated references to RFC 9110. The original document
has been superseded.

Author: v-perfilev

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

@@ -37,25 +37,25 @@ public final class HttpMethod implements Comparable<HttpMethod>, Serializable {
 
 	/**
 	 * The HTTP method {@code GET}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.3">HTTP 1.1, section 9.3</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.1">RFC 9110, section 9.3.1</a>
 	 */
 	public static final HttpMethod GET = new HttpMethod("GET");
 
 	/**
 	 * The HTTP method {@code HEAD}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.4">HTTP 1.1, section 9.4</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.2">RFC 9110, section 9.3.2</a>
 	 */
 	public static final HttpMethod HEAD = new HttpMethod("HEAD");
 
 	/**
 	 * The HTTP method {@code POST}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.5">HTTP 1.1, section 9.5</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.3">RFC 9110, section 9.3.3</a>
 	 */
 	public static final HttpMethod POST = new HttpMethod("POST");
 
 	/**
 	 * The HTTP method {@code PUT}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.6">HTTP 1.1, section 9.6</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.4">RFC 9110, section 9.3.4</a>
 	 */
 	public static final HttpMethod PUT = new HttpMethod("PUT");
 
@@ -67,19 +67,19 @@ public final class HttpMethod implements Comparable<HttpMethod>, Serializable {
 
 	/**
 	 * The HTTP method {@code DELETE}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.7">HTTP 1.1, section 9.7</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.5">RFC 9110, section 9.3.5</a>
 	 */
 	public static final HttpMethod DELETE = new HttpMethod("DELETE");
 
 	/**
 	 * The HTTP method {@code OPTIONS}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.2">HTTP 1.1, section 9.2</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.7">RFC 9110, section 9.3.7</a>
 	 */
 	public static final HttpMethod OPTIONS = new HttpMethod("OPTIONS");
 
 	/**
 	 * The HTTP method {@code TRACE}.
-	 * @see <a href="https://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.8">HTTP 1.1, section 9.8</a>
+	 * @see <a href="https://www.rfc-editor.org/rfc/rfc9110.html#section-9.3.8">RFC 9110, section 9.3.8</a>
 	 */
 	public static final HttpMethod TRACE = new HttpMethod("TRACE");