Updated Filters (markdown)

Filters.md

@@ -37,6 +37,12 @@ wtsexporter -a --date "> 2023-01-01 00:00"
 # Chat Filter
 The exporter currently supports two chat filters, namely, include and exclude.
 
+## Usage
+The options takes one or more phone numbers as the arguments.
+
+Note that the for both include and exclude chat filters, the country calling codes are optional.
+
+## Example
 ### Include
 This will only export messages sent by the specified correspondent:
 ```
@@ -57,6 +63,4 @@ wtsexporter -a --exclude 85212345678
 Multiple correspondents can also be included at once:
 ```
 wtsexporter -a --exclude 85212345678 85298765432
-```
-
-Note that the for both include and exclude chat filters, the country calling codes are optional.
+```