INTYGFV-16783: Use seeOther (303) instead of temporaryRedirect (307) …

…for launch-unit-selection should always be a GET request

web/src/main/java/se/inera/intyg/webcert/web/web/controller/integration/IntygIntegrationController.java

@@ -323,7 +323,7 @@ private Response buildErrorResponse(UriInfo uriInfo, String errorReason) {
 
     private Response buildSelectUnitResponse(UriInfo uriInfo, String certificateId) {
         final var location = reactUriFactory.uriForUnitSelection(uriInfo, certificateId);
-        return Response.temporaryRedirect(location).build();
+        return Response.seeOther(location).build();
     }
 
     private Response buildViewCertificateResponse(UriInfo uriInfo, PrepareRedirectToIntyg prepareRedirectToIntyg) {