Clarify a sentence

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/docs/3.0-migration-guide.md b/docs/3.0-migration-guide.md
index ad5a0ee..9bcaa0d 100644
--- a/docs/3.0-migration-guide.md
+++ b/docs/3.0-migration-guide.md
@@ -196,7 +196,7 @@
 
 This doesn't affect people using the default configuration.
 
-This option has been inactive for a long time. Please use the `lifetime`
+This option has not had any effect for a long time. Please use the `lifetime`
 parameter of `mbedtls_ssl_ticket_setup()` instead.
 
 Remove helpers for the transition from Mbed TLS 1.3 to Mbed TLS 2.0