Bump intl to 5464b3b95635e97f67e29d71bdbe85a5d4126971

Changes:
```
> git log --format="%C(auto) %h %s" 6806ab0..5464b3b
 https://dart.googlesource.com/intl.git/+/5464b3b Remove an unnecessary sort (#496)

```

Diff: https://dart.googlesource.com/intl.git/+/6806ab06fa6145f30dbcd5cbfeb3aeaadd21ea8e~..5464b3b95635e97f67e29d71bdbe85a5d4126971/
Change-Id: Ic32c31be41deb11a60b2d0fd8de38117ad248ab1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/261201
Reviewed-by: Moritz Sümmermann <[email protected]>
Commit-Queue: Moritz Sümmermann <[email protected]>
Auto-Submit: Devon Carew <[email protected]>

Author: devoncarew

DEPS

@@ -122,7 +122,7 @@ vars = {
   "http_parser_rev": "b968f7ddde0588273a6cbd1d2eb6569f418606ac",
   "http_rev": "738a55b20e391c5a526b86bf4b02af6b7745b494",
   "icu_rev": "81d656878ec611cb0b42d52c82e9dae93920d9ba",
-  "intl_rev": "6806ab06fa6145f30dbcd5cbfeb3aeaadd21ea8e",
+  "intl_rev": "5464b3b95635e97f67e29d71bdbe85a5d4126971",
   "jinja2_rev": "2222b31554f03e62600cd7e383376a7c187967a1",
   "json_rpc_2_rev": "805e6536dd961d66f6b8cd46d8f3e61774f957c9",
   "linter_rev": "f2c55484e8ebda0aec8c2fea637b3bd5b17258ca", # 1.28.0