Fix doctest on GHC 9.2-9.6 without multiple hidden

Author: christiaanb

clash-prelude/src/Clash/Prelude/BlockRam.hs

@@ -846,6 +846,13 @@ readNew (blockRam (0 :> 1 :> Nil))
      ... =>
      Signal dom addr -> Signal dom (Maybe (addr, a)) -> Signal dom a
 
+#elif __GLASGOW_HASKELL__ >= 902 && !defined(CLASH_MULTIPLE_HIDDEN)
+>>> :t readNew (blockRam (0 :> 1 :> Nil))
+readNew (blockRam (0 :> 1 :> Nil))
+  :: ...
+     ... =>
+     Signal dom addr -> Signal dom (Maybe (addr, a)) -> Signal dom a
+
 #else
 >>> :t readNew (blockRam (0 :> 1 :> Nil))
 readNew (blockRam (0 :> 1 :> Nil))