Fix typo in pkparse.c
diff --git a/library/pkparse.c b/library/pkparse.c
index b6a8d2e..e48f37b 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -859,7 +859,7 @@
     const mbedtls_pk_info_t *pk_info;
 
     /*
-     * This function parses the PrivatKeyInfo object (PKCS#8 v1.2 = RFC 5208)
+     * This function parses the PrivateKeyInfo object (PKCS#8 v1.2 = RFC 5208)
      *
      *    PrivateKeyInfo ::= SEQUENCE {
      *      version                   Version,