DOC: Fix capitalization among headings in documentation files (#32550) part 3
Files updated:

```
doc/source/getting_started/comparison/comparison_with_sas.rst
doc/source/getting_started/comparison/comparison_with_sql.rst
doc/source/getting_started/comparison/comparison_with_stata.rst
doc/source/getting_started/intro_tutorials/01_table_oriented.rst
doc/source/getting_started/tutorials.rst
```
