Update the password minimum length to 8 (#5516)

Signed-off-by: wenhaozhou <wenhaozhou@yunify.com>

config/ks-core/crds/iam.kubesphere.io_federatedusers.yaml

@@ -96,7 +96,7 @@ spec:
                           ... Last but not least, the bcrypt string is also included
                           to match the encrypted password. ^(\$2[ayb]\$.{56})$'
                         maxLength: 64
-                        minLength: 6
+                        minLength: 8
                         pattern: ^(.*[a-z].*[A-Z].*[0-9].*)$|^(.*[a-z].*[0-9].*[A-Z].*)$|^(.*[A-Z].*[a-z].*[0-9].*)$|^(.*[A-Z].*[0-9].*[a-z].*)$|^(.*[0-9].*[a-z].*[A-Z].*)$|^(.*[0-9].*[A-Z].*[a-z].*)$|^(\$2[ayb]\$.{56})$
                         type: string
                     required: