docs: minor changes. (#4109)

removed deprecated. file, solution.
indent function attribute.

---------

Co-authored-by: pyansys-ci-bot <[email protected]>

Author: abhishekchitwar

doc/changelog.d/4109.documentation.md

@@ -0,0 +1 @@
+minor changes.

doc/source/user_guide/monitors.rst

@@ -29,7 +29,7 @@ callback mechanism to perform a simple tabulation of monitored values per iterat
   >>> import_data = examples.download_file(
   >>>     file_name="exhaust_system.dat.h5", directory="pyfluent/exhaust_system"
   >>> )
-  >>> solver.file.read_case_data(file_name=import_case)
+  >>> solver.settings.file.read_case_data(file_name=import_case)
   >>> # check the active report plot monitors using the settings relevant object
   >>> sorted(solver.settings.solution.monitor.report_plots())
   >>> [
@@ -39,7 +39,7 @@ callback mechanism to perform a simple tabulation of monitored values per iterat
   >>>     "point-vel-rplot",
   >>> ]
   >>> # initialize so that monitors object is usable
-  >>> solver.solution.initialization.hybrid_initialize()
+  >>> solver.settings.solution.initialization.hybrid_initialize()
   >>> # check which monitors are available
   >>> sorted(solver.monitors.get_monitor_set_names())
   >>> [
@@ -67,7 +67,7 @@ callback mechanism to perform a simple tabulation of monitored values per iterat
   >>>             # The streamed data contains duplicates, so eliminate them
   >>>             df = df.drop_duplicates(subset='Iteration')
   >>>             print(tabulate(df, headers='keys', tablefmt='psql'))
-  >>>         display_table.iter_count = 0
+  >>>     display_table.iter_count = 0
   >>>     return display_table
   >>>
   >>>