Fix typos

db/db.go

@@ -108,7 +108,7 @@ func discardTxnOnPanic(txn Transaction) {
 	p := recover()
 	if p != nil {
 		if err := txn.Discard(); err != nil {
-			fmt.Fprintf(os.Stderr, "failed discarding panicing txn err: %s", err)
+			fmt.Fprintf(os.Stderr, "failed discarding panicking txn err: %s", err)
 		}
 		panic(p)
 	}

vm/rust/src/juno_state_reader.rs

@@ -139,7 +139,7 @@ impl StateReader for JunoStateReader {
             // About the changes in the second attempt at making class cache behave as expected;
             //
             // The initial assumption here was that `self.height` uniquely identifies and strictly orders the underlying state
-            // instances. The first assumption doesn't necessarily hold, because we can pass different state instaces with the
+            // instances. The first assumption doesn't necessarily hold, because we can pass different state instances with the
             // same height. This most commonly happens with call/estimate/simulate and trace flows. Trace flow calls the VM
             // for block number N with the state at the beginning of the block, while call/estimate/simulate flows call the VM
             // with the same block number but with the state at the end of that block. That is why, we cannot use classes from cache