improve docs

Signed-off-by: Manuel <5673677+mtrezza@users.noreply.github.com>

Author: mtrezza

src/Options/Definitions.js

@@ -260,7 +260,7 @@ module.exports.ParseServerOptions = {
   extendSessionOnUse: {
     env: 'PARSE_SERVER_EXTEND_SESSION_ON_USE',
     help:
-      "Whether Parse Server should automatically extend a valid session by the sessionLength. The session will be extended when a request is received after half of the session's lifetime has passed.",
+      "Whether Parse Server should automatically extend a valid session by the sessionLength. In order to reduce the number of session updates in the database, a session will only be extended when a request is received after at least half of the current session's lifetime has passed.",
     action: parsers.booleanParser,
     default: false,
   },

src/Options/docs.js

@@ -228,7 +228,7 @@ export interface ParseServerOptions {
   /* Session duration, in seconds, defaults to 1 year
   :DEFAULT: 31536000 */
   sessionLength: ?number;
-  /* Whether Parse Server should automatically extend a valid session by the sessionLength. The session will be extended when a request is received after half of the session's lifetime has passed.
+  /* Whether Parse Server should automatically extend a valid session by the sessionLength. In order to reduce the number of session updates in the database, a session will only be extended when a request is received after at least half of the current session's lifetime has passed.
   :DEFAULT: false */
   extendSessionOnUse: ?boolean;
   /* Default value for limit option on queries, defaults to `100`.