docs: update typos in headings

docs/source/getting_started/commands/bitia_checksum.md

-# bitia checksum
+# BiTIA checksum
 
 
 command for deterministically creating a single hash for a directory of files,

docs/source/getting_started/commands/bitia_create_container.md

-# bitia create_container
+# BiTIA create_container
 
 Create container for the pipeline. The container starts running immediately on the server. 
 

docs/source/getting_started/commands/bitia_list_container.md

-# bitia list-container
+# BiTIA list-container
 
                   
 list the remote server associated with the pipeline.                 

docs/source/getting_started/commands/bitia_logs.md

-# BiTIA Logs
+# BiTIA logs
 
 User can view their output logs of previous sessions using this command
 

docs/source/getting_started/commands/bitia_run.md

 
-# Bitia run 
+# BiTIA run 
 
 Executes the pipeline in server [public.bitia.link/api](https://public.bitia.link/api/) and displays the output in the CLI simultaneously.