replace path matching from getPathInfo to getRequestURI.

`getRequestURI()` → full request path (without query).

`getPathInfo()` → extra path after the servlet's mapping, or null if none.

So if I am configuring my Servlet to be mapped on `/somePath` and initiating the Servlet:
```
new HttpServletSseServerTransport(new ObjectMapper(), "/somePath/message", "/somePath/sse")
```

it will work and won't fail.
`getPathInfo` will return "/message" and "/sse".
while `getRequestURI` will return "/somePath/message" and "/somePath/sse" and will not fail on the validation.

Author: OrGivati

mcp/src/main/java/io/modelcontextprotocol/server/transport/HttpServletSseServerTransportProvider.java

@@ -170,8 +170,8 @@ public Mono<Void> notifyClients(String method, Map<String, Object> params) {
 	protected void doGet(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
 
-		String pathInfo = request.getPathInfo();
-		if (!sseEndpoint.equals(pathInfo)) {
+		String requestURI = request.getRequestURI();
+		if (!sseEndpoint.equals(requestURI)) {
 			response.sendError(HttpServletResponse.SC_NOT_FOUND);
 			return;
 		}
@@ -225,8 +225,8 @@ protected void doPost(HttpServletRequest request, HttpServletResponse response)
 			return;
 		}
 
-		String pathInfo = request.getPathInfo();
-		if (!messageEndpoint.equals(pathInfo)) {
+		String requestURI = request.getRequestURI();
+		if (!messageEndpoint.equals(requestURI)) {
 			response.sendError(HttpServletResponse.SC_NOT_FOUND);
 			return;
 		}