Update specs/quint/specs/reset/README.md

Co-authored-by: Daniel <daniel.cason@informal.systems>

specs/quint/specs/reset/README.md

@@ -11,7 +11,7 @@ We used `quint run` to conduct random simulation, and checked that the invariant
     - `provenHeightMonotonic`: latest L2 proven height in L1 blocks is non-decreasing
     - `L1ForkIDMonotonic`: L2 forkID in L1 blocks is non-decreasing
     - `InvalidRegistrationProofRejectedInv`: If the latest block in L1 does not include a (valid) proof or the proof contains an invalid registration, then the proof should be rejected. We check that by attesting that L1's provenHeight remains unchanged  (checked also for `--step "stepWithInvalidRegs"`)
-    - `OldProofRejectedInv`: If the proof starts from a block smaller than provenHeight it is rejected. (checked also with step `stepWithPotentiallyOldProofs`)
+    - `OldProofRejectedInv`: L1 blocks should not accept proofs with non monotonically increasing proven L2 heights. As a consequence, the latest L2 proven height in L1 should remain unchanged with such a proof is submitted (checked also with `--step stepWithPotentiallyOldProofs`)
     - `FutureProofRejectedInv`: If the proof starts from a block with height greater than provenHeight + 1 it is rejected. (checked also with step `stepWithPotentiallyFutureProofs`)
 
 - Local L2 invariants