Add documentation for logger regex filters

source/_integrations/logger.markdown

@@ -88,6 +88,14 @@ where **namespace** is the *<component_namespace>* currently logging.
       '&lt;component_namespace&gt;':
         description: Logger namespace of the component. See [log_level](#log-levels).
         type: string
+  filters:
+    description: Regular Expression logging filters.
+    required: false
+    type: map
+    keys:
+      '&lt;component_namespace&gt;':
+        description: Logger namespace of the component and a list of Regular Expressions. See [Log Filters](#log-filters).
+        type: list
 {% endconfiguration %}
 
 In the example, do note the difference between 'glances_api' and 'homeassistant.components.glances' namespaces,
@@ -110,6 +118,26 @@ Possible log severity levels, listed in order from most severe to least severe,
 - debug
 - notset
 
+### Log Filters
+
+Service-specific Regular Expression filters for logs. A message is omitted if it matches the Regular Expression.
+
+An example configuration might look like this:
+
+```yaml
+# Example configuration.yaml entry
+logger:
+  default: info
+  logs:
+    custom_components.my_integration: critical
+  filters:
+    custom_component.my_integartion:
+      - "HTTP 429" # Filter all HTTP 429 errors
+      - "Request to .*unreliable.com.* Timed Out"
+    homeassistant.components.nws:
+      - "^Error handling request$"
+```
+
 ## Services
 
 ### Service `set_default_level`