Merge rust-bitcoin#4580: fix typo Porallel to Parallel crypto.rs

357ae40 fix typo Porallel to Parallel crypto.rs (Fallengirl)

Pull request description:

  Hi devs! Found and fixed one typo in `hashes/src/ripemd160/crypto.rs`

  `Porallel` - `Parallel`

ACKs for top commit:
  tcharding:
    ACK 357ae40

Tree-SHA512: 67b166f8f0262cc9f4fdd9d4cbe74977ca86e0256d0129f645559aa4e75fd30d978d8995d503932c90f000eee4d87b47cc4dd5eac8405d5cd02124346ad35b3a

Author: apoelstra

hashes/src/ripemd160/crypto.rs

@@ -229,7 +229,7 @@ impl HashEngine {
             round5: h_ordering 2, 3, 4, 0, 1; data_index 15; roll_shift  5;
             round5: h_ordering 1, 2, 3, 4, 0; data_index 13; roll_shift  6;
 
-            // Porallel Round 1;
+            // Parallel Round 1;
             par_round1: h_ordering 0, 1, 2, 3, 4; data_index  5; roll_shift  8;
             par_round1: h_ordering 4, 0, 1, 2, 3; data_index 14; roll_shift  9;
             par_round1: h_ordering 3, 4, 0, 1, 2; data_index  7; roll_shift  9;