Weaken the note about linking all stores

This is now true only if you have a case like randomizer-lambda, where
it imports a specific store and skips the environment-based logic
entirely. (Which still makes it kind of true, to be clear.)

Author: featherbread

internal/store/store.go

@@ -26,7 +26,7 @@ var hasAllStoreBackends bool
 // may panic if a non-empty partition is required and not given.
 //
 // Factory is provided for documentation purposes. Do not import the store
-// package just to use this alias; this will link support for all possible
+// package just to use this alias; this may link support for all possible
 // store backends into the final program, even if this was not intended.
 type Factory = func(partition string) randomizer.Store