wrong highlighting for yaml with comments ending with a colon (:) #2652

What to do:

1. Open demo: https://pygments.org/demo/
2. Select Language: YAML
3. Copy-paste the following:

   {
     "foo": "foo",
      # foo:
     "bar": "bar",
      # baz: 0
     "baz": "baz",
      # baz
   }

4. Choose HTML formatter and lightbulb style.

Observed behavior:

Expected behavior:

1. First comment (foo) should be gray as other comments.
2. Second comment (baz) should be gray as other comments.
3. Highlighting of baz key is wrong.