Fix typos (#10675)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

sdk/src/abi_digester.rs

@@ -62,7 +62,7 @@ impl AbiDigester {
         }
     }
 
-    // must create separate instances because we can't pass the single instnace to
+    // must create separate instances because we can't pass the single instance to
     // `.serialize()` multiple times
     pub fn create_new(&self) -> Self {
         Self {

sdk/src/slot_history.rs

@@ -83,7 +83,7 @@ mod tests {
     #[test]
     fn slot_history_test1() {
         solana_logger::setup();
-        // should be divisable by 64 since the clear logic works on blocks
+        // should be divisible by 64 since the clear logic works on blocks
         assert_eq!(MAX_ENTRIES % 64, 0);
         let mut slot_history = SlotHistory::default();
         info!("add 2");