Pin dependency to fix doc build

[piyushmadan]

As per the latest doc build,
mkdocstrings 0.15.0 requires Jinja2<3.0,>=2.11, but you have jinja2 3.1.2 which is incompatible.

azure-ml-component has a dependency on jinja2 but it doesn't pin it to any particular version and the latest version is installed.

[github-actions]

Unit Test Results for Build

    1 files  ±0      1 suites  ±0   1m 17s ⏱️ -12s
117 tests ±0  117 ✔️ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 0b6e1d3. ± Comparison against base commit e2abd3e.

♻️ This comment has been updated with latest results.

[github-actions]

Package	Line Rate	Branch Rate	Complexity
common	81%	0%	0
pipelines.azureml	74%	0%	0
scripts	100%	0%	0
scripts.data_processing.generate_data	92%	0%	0
scripts.data_processing.lightgbm_data2bin	95%	0%	0
scripts.data_processing.partition_data	92%	0%	0
scripts.inferencing.custom_win_cli	94%	0%	0
scripts.inferencing.lightgbm_c_api	75%	0%	0
scripts.inferencing.lightgbm_python	95%	0%	0
scripts.inferencing.lightgbm_ray	95%	0%	0
scripts.inferencing.treelite_python	94%	0%	0
scripts.model_transformation.treelite_compile	92%	0%	0
scripts.sample	93%	0%	0
scripts.training.lightgbm_python	77%	0%	0
scripts.training.lightgbm_ray	88%	0%	0
scripts.training.ray_tune	76%	0%	0
Summary	82% (2118 / 2571)	0% (0 / 0)	0