chore: fix typos (anza-xyz#1280)

Co-authored-by: arkdrq <169236000+arkdrq@users.noreply.github.com>

core/src/banking_stage/leader_slot_metrics.rs

@@ -137,7 +137,7 @@ struct LeaderSlotPacketCountMetrics {
     committed_transactions_with_successful_result_count: u64,
 
     // total number of transactions that were not executed or failed commit, BUT were added back to the buffered
-    // queue becaus they were retryable errors
+    // queue because they were retryable errors
     retryable_errored_transaction_count: u64,
 
     // The size of the unprocessed buffer at the end of the slot
@@ -1164,7 +1164,7 @@ mod tests {
             mut leader_slot_metrics_tracker,
         } = setup_test_slot_boundary_banks();
         // Test case where the thread has a leader bank, and now detects there's a new leader bank
-        // for a samller slot, implying the slot has ended. Metrics should be reported for the
+        // for a smaller slot, implying the slot has ended. Metrics should be reported for the
         // bigger slot
         {
             // Setup with next_bank

core/src/banking_stage/transaction_scheduler/scheduler_controller.rs

@@ -99,7 +99,7 @@ impl SchedulerController {
             // are different, since new BankingStage will not forward packets.
             // For `Forward` and `ForwardAndHold`, we want to receive packets but will not
             // forward them to the next leader. In this case, `ForwardAndHold` is
-            // indistiguishable from `Hold`.
+            // indistinguishable from `Hold`.
             //
             // `Forward` will drop packets from the buffer instead of forwarding.
             // During receiving, since packets would be dropped from buffer anyway, we can