minor #14034 Change char to varchar type (PF4Public)

This PR was merged into the 3.4 branch.

Discussion
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Change char to varchar type

This should fix symfony/symfony#37672

Commits
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cff16b0 Change char to varchar type

Author: xabbuh

security/remember_me.rst

@@ -307,7 +307,7 @@ so ``DoctrineTokenProvider`` can store the tokens:
 
     CREATE TABLE `rememberme_token` (
         `series`   char(88)     UNIQUE PRIMARY KEY NOT NULL,
-        `value`    char(88)     NOT NULL,
+        `value`    varchar(88)  NOT NULL,
         `lastUsed` datetime     NOT NULL,
         `class`    varchar(100) NOT NULL,
         `username` varchar(200) NOT NULL