Indicate tower_cli.cfg can also be in current directory (#15092)

Update readme to provide more details on how tower_cli.cfg is used.

Co-authored-by: Hao Liu <44379968+TheRealHaoLiu@users.noreply.github.com>

awx_collection/tools/roles/template_galaxy/templates/README.md.j2

@@ -47,6 +47,7 @@ These can be specified via (from highest to lowest precedence):
  - direct module parameters
  - environment variables (most useful when running against localhost)
  - a config file path specified by the `tower_config_file` parameter
+ - a config file at `./tower_cli.cfg`, i.e. in the current directory
  - a config file at `~/.tower_cli.cfg`
  - a config file at `/etc/tower/tower_cli.cfg`
 
@@ -60,6 +61,15 @@ username = foo
 password = bar
 ```
 
+or like this:
+
+```
+host: https://localhost:8043
+verify_ssl: true
+oauth_token: <token>
+
+```
+
 ## Release and Upgrade Notes
 
 Notable releases of the `{{ collection_namespace }}.{{ collection_package }}` collection: