[doc] Upgrade the doc following the addition of clear-cache-post-run (#7958)

Author: Pierre-Sassoulas

doc/user_guide/configuration/all-options.rst

@@ -20,6 +20,13 @@ Standard Checkers
 **Default:**  ``False``
 
 
+--clear-cache-post-run
+""""""""""""""""""""""
+*Clear in-memory caches upon conclusion of linting. Useful if running pylint in a server-like mode.*
+
+**Default:**  ``False``
+
+
 --confidence
 """"""""""""
 *Only show warnings with the listed confidence levels. Leave empty to show all. Valid levels: HIGH, CONTROL_FLOW, INFERENCE, INFERENCE_FAILURE, UNDEFINED.*
@@ -215,6 +222,8 @@ Standard Checkers
    [tool.pylint.main]
    analyse-fallback-blocks = false
 
+   clear-cache-post-run = false
+
    confidence = ["HIGH", "CONTROL_FLOW", "INFERENCE", "INFERENCE_FAILURE", "UNDEFINED"]
 
    disable = ["consider-using-augmented-assign"]