[deps] rev http, yaml

Revisions updated by `dart tools/rev_sdk_deps.dart`.

http (https://github.com/dart-lang/http/compare/a0781c5..73fce77):
  73fce77  2024-07-19  Nate Bosch  Prepare to publish ok_http (dart-lang/http#1274)

yaml (https://github.com/dart-lang/yaml/compare/30fd9e0..a645c39):
  a645c39  2024-07-21  Tamcy  Handle surrogate pairs during scanning (dart-lang/yaml#159)

Change-Id: I32d27892bdb07978ee712c8446142addafec61a1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/377040
Reviewed-by: Konstantin Shcheglov <[email protected]>
Commit-Queue: Devon Carew <[email protected]>

DEPS

@@ -151,7 +151,7 @@ vars = {
   "flute_rev": "a531c96a8b43d015c6bfbbfe3ab54867b0763b8b",
   "glob_rev": "8b05be87f84f74d90dc0c15956f3ff95805322e5",
   "html_rev": "0da420ca1e196cda54ede476d0d8d3ecf55375ef",
-  "http_rev": "a0781c52def5354bf0f069b56649a018f3ca357c",
+  "http_rev": "73fce7763a40920c1ce6cb5d2258d8662813ac9d",
   "http_multi_server_rev": "8348be1bf8fd17881e2643086e68c9d2b28dd9ce",
   "http_parser_rev": "ce528cf82f3d26ac761e29b2494a9e0c270d4939",
   "intl_rev": "5d65e3808ce40e6282e40881492607df4e35669f",
@@ -195,7 +195,7 @@ vars = {
   "webdev_rev": "75417c09181c97786d9539a662834bed9d2f1e77",
   "webdriver_rev": "718e4c37d004fceb9856de980782c46bf9576df5",
   "webkit_inspection_protocol_rev": "32fffa53df3f54005c742ddf4f859fb585a6b254",
-  "yaml_rev": "30fd9e0cd49b2e04f74769f9b24a0300e400403e",
+  "yaml_rev": "a645c3905fc3cc2bbd3def9879ba8dedd26e3aa5",
   "yaml_edit_rev": "d605cce3946828253a97f4b3de1a43260b6edf3b",
 
   # Windows deps