chore: typo fixes (#6594)

local-cluster/tests/local_cluster.rs

@@ -3388,7 +3388,7 @@ fn do_test_lockout_violation_with_or_without_tower(with_tower: bool) {
         let a_blockstore = open_blockstore(&val_a_ledger_path);
         copy_blocks(next_slot_on_a, &b_blockstore, &a_blockstore, false);
 
-        // Purge uneccessary slots
+        // Purge unnecessary slots
         purge_slots_with_count(&a_blockstore, next_slot_on_a + 1, truncated_slots);
     }
 

storage-bigtable/proto/google.api.rs

@@ -1208,7 +1208,7 @@ pub struct ResourceReference {
 /// The routing header consists of one or multiple key-value pairs. Every key
 /// and value must be percent-encoded, and joined together in the format of
 /// `key1=value1&key2=value2`.
-/// In the examples below I am skipping the percent-encoding for readablity.
+/// In the examples below I am skipping the percent-encoding for readability.
 ///
 /// Example 1
 ///