Fix AutofillUseParameterizedSectioning field trial entry

A new feature parameter was introduced in crrev.com/c/4474251. To move
the feature to beta, this parameter needs to be reflected in the field
trial config.

Bug: 1153539
Change-Id: Iae51c169b54ef5f58c41824caf38e8151396bec4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4567843


Reviewed-by: Christoph Schwering <schwering@google.com>
Commit-Queue: Christoph Schwering <schwering@google.com>
Auto-Submit: Florian Leimgruber <fleimgruber@google.com>
Cr-Commit-Position: refs/heads/main@{#1149237}