add PR number

Author: Enchufa2

inst/NEWS.Rd

@@ -7,7 +7,7 @@
   \itemize{
     \item Changes in Rcpp API:
     \itemize{
-      \item Unwind protection is enabled by default (Iñaki in \ghpr{xxxx}).
+      \item Unwind protection is enabled by default (Iñaki in \ghpr{1225}).
       It can be disabled by defining \code{RCPP_NO_UNWIND_PROTECT} before
       including \code{Rcpp.h}. \code{RCPP_USE_UNWIND_PROTECT} is not checked
       anymore and has no effect. The associated plugin \code{unwindProtect}