Fix issue number typo in note

Author: jonas-schievink

src/librustc_trait_selection/traits/error_reporting/suggestions.rs

@@ -1685,7 +1685,7 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
                 if suggest_const_in_array_repeat_expressions {
                     err.note(
                         "this array initializer can be evaluated at compile-time, see issue \
-                         #48147 <https://github.com/rust-lang/rust/issues/49147> \
+                         #49147 <https://github.com/rust-lang/rust/issues/49147> \
                          for more information",
                     );
                     if tcx.sess.opts.unstable_features.is_nightly_build() {

src/test/ui/feature-gates/feature-gate-const_in_array_repeat_expressions.stderr

@@ -7,7 +7,7 @@ LL |     let arr: [Option<String>; 2] = [None::<String>; 2];
    = help: the following implementations were found:
              <std::option::Option<T> as std::marker::Copy>
    = note: the `Copy` trait is required because the repeated element will be copied
-   = note: this array initializer can be evaluated at compile-time, see issue #48147 <https://github.com/rust-lang/rust/issues/49147> for more information
+   = note: this array initializer can be evaluated at compile-time, see issue #49147 <https://github.com/rust-lang/rust/issues/49147> for more information
    = help: add `#![feature(const_in_array_repeat_expressions)]` to the crate attributes to enable
 
 error[E0277]: the trait bound `std::option::Option<std::string::String>: std::marker::Copy` is not satisfied