fix BoundedTrieData get_result return type hint #28516

Job	Run time
Check GCP variables	30s
Python Unit Tests (macos-latest, 3.9, py39)	15m 28s
Python Wordcount Direct Runner (self-hosted, ubuntu-20.04, main, 3.9)	6m 41s
Python Unit Tests (macos-latest, 3.10, py310)	13m 5s
Python Wordcount Direct Runner (self-hosted, ubuntu-20.04, main, 3.10)	7m 53s
Python Unit Tests (macos-latest, 3.11, py311)	13m 37s
Python Wordcount Direct Runner (self-hosted, ubuntu-20.04, main, 3.11)	7m 57s
Python Unit Tests (macos-latest, 3.12, py312)	16m 53s
Python Wordcount Direct Runner (self-hosted, ubuntu-20.04, main, 3.12)	11m 17s
Python Unit Tests (windows-latest, 3.9, py39)	14m 43s
Python Wordcount Direct Runner (macos-latest, 3.9)	4m 6s
Python Unit Tests (windows-latest, 3.10, py310)	14m 39s
Python Wordcount Direct Runner (macos-latest, 3.10)	2m 47s
Python Unit Tests (windows-latest, 3.11, py311)	13m 57s
Python Wordcount Direct Runner (macos-latest, 3.11)	2m 54s
Python Wordcount Direct Runner (macos-latest, 3.12)	2m 33s
Python Unit Tests (windows-latest, 3.12, py312)	14m 33s
Python Wordcount Direct Runner (windows-latest, 3.9)	4m 38s
Python Wordcount Direct Runner (windows-latest, 3.10)	4m 6s
Python Wordcount Direct Runner (windows-latest, 3.11)	4m 11s
Python Wordcount Direct Runner (windows-latest, 3.12)	4m 40s
Build python source distribution	0s
Python Wordcount Dataflow	0s
	3h 1m 8s

Provide feedback