Update CLI docs

Author: eric-forte-elastic

CLI.md

@@ -106,6 +106,7 @@ Options:
   -snv, --strip-none-values       Strip None values from the rule
   -lc, --local-creation-date      Preserve the local creation date of the rule
   -lu, --local-updated-date       Preserve the local updated date of the rule
+  -lr, --load-rule-loading        Enable arbitrary rule loading from the rules directories (Can be very slow!)
   -h, --help                      Show this message and exit.
 ```
 
@@ -507,6 +508,7 @@ Options:
   -lu, --local-updated-date       Preserve the local updated date of the rule
   -cro, --custom-rules-only       Only export custom rules
   -eq, --export-query TEXT        Apply a query filter to exporting rules e.g. "alert.attributes.tags: \"test\"" to filter for rules that have the tag "test"
+  -lr, --load-rule-loading        Enable arbitrary rule loading from the rules directories (Can be very slow!)
   -h, --help                      Show this message and exit.
 
 ```

detection_rules/kbwrap.py

@@ -254,7 +254,7 @@ def _process_imported_items(
     "--load-rule-loading",
     "-lr",
     is_flag=True,
-    help="Enable arbitrary rule loading from the rules directory (Can be very slow!)",
+    help="Enable arbitrary rule loading from the rules directories (Can be very slow!)",
 )
 @click.pass_context
 def kibana_export_rules(  # noqa: PLR0912, PLR0913, PLR0915

detection_rules/main.py

@@ -161,7 +161,7 @@ def generate_rules_index(
     "--load-rule-loading",
     "-lr",
     is_flag=True,
-    help="Enable arbitrary rule loading from the rules directory (Can be very slow!)",
+    help="Enable arbitrary rule loading from the rules directories (Can be very slow!)",
 )
 def import_rules_into_repo(  # noqa: PLR0912, PLR0913, PLR0915
     input_file: tuple[Path, ...] | None,