fix-rules-typo (erigontech#8681)

Author: dlscjf151

erigon-lib/rules.go

@@ -76,7 +76,7 @@ func mismatchingUnlock(m dsl.Matcher) {
 	m.Match(`$mu.Lock(); defer $mu.$unlock()`).
 		Where(m["unlock"].Text == "RUnlock").
 		At(m["unlock"]).
-		Report(`maybe $2mu.Unlock() was intended?
+		Report(`maybe $mu.Unlock() was intended?
 			Rules are in ./rules.go file.`)
 
 	m.Match(`$mu.RLock(); defer $mu.$unlock()`).

rules.go

@@ -75,7 +75,7 @@ func mismatchingUnlock(m dsl.Matcher) {
 	m.Match(`$mu.Lock(); defer $mu.$unlock()`).
 		Where(m["unlock"].Text == "RUnlock").
 		At(m["unlock"]).
-		Report(`maybe $2mu.Unlock() was intended?
+		Report(`maybe $mu.Unlock() was intended?
 			Rules are in ./rules.go file.`)
 
 	m.Match(`$mu.RLock(); defer $mu.$unlock()`).