Adjust threshold config (#6246)

* fix:mount deadlock

* fix

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Co-authored-by: zemul <zhouzemiao@ihuman.com>

weed/command/scaffold/master.toml

@@ -49,6 +49,7 @@ copy_1 = 7                # create 1 x 7 = 7 actual volumes
 copy_2 = 6                # create 2 x 6 = 12 actual volumes
 copy_3 = 3                # create 3 x 3 = 9 actual volumes
 copy_other = 1            # create n x 1 = n actual volumes
+threshold = 0.9           # create threshold
 
 # configuration flags for replication
 [master.replication]