Fix NullAway error

Related spring-projects/spring-framework#35629

Author: jgrandja

web/src/main/java/org/springframework/security/web/FormPostRedirectStrategy.java

@@ -101,7 +101,7 @@ public void sendRedirect(final HttpServletRequest request, final HttpServletResp
 		// @formatter:off
 		final String html = REDIRECT_PAGE_TEMPLATE
 			// Clear the query string as we don't want that to be part of the form action URL
-			.replace("{{action}}", HtmlUtils.htmlEscape(uriComponentsBuilder.query(null).build().toUriString()))
+			.replace("{{action}}", HtmlUtils.htmlEscape(uriComponentsBuilder.replaceQuery(null).build().toUriString()))
 			.replace("{{params}}", hiddenInputsHtmlBuilder.toString())
 			.replace("{{nonce}}", HtmlUtils.htmlEscape(nonce));
 		// @formatter:on

web/src/main/java/org/springframework/security/web/server/FormPostServerRedirectStrategy.java

@@ -105,7 +105,7 @@ public Mono<Void> sendRedirect(ServerWebExchange exchange, URI location) {
 		// @formatter:off
 		final String html = REDIRECT_PAGE_TEMPLATE
 			// Clear the query string as we don't want that to be part of the form action URL
-			.replace("{{action}}", HtmlUtils.htmlEscape(uriComponentsBuilder.query(null).build().toUriString()))
+			.replace("{{action}}", HtmlUtils.htmlEscape(uriComponentsBuilder.replaceQuery(null).build().toUriString()))
 			.replace("{{params}}", hiddenInputsHtmlBuilder.toString())
 			.replace("{{nonce}}", HtmlUtils.htmlEscape(nonce));
 		// @formatter:on