Fix typo in an OID name

fixes #314
diff --git a/ChangeLog b/ChangeLog
index f5267c6..02ebc2c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23,6 +23,7 @@
      Matthew Page of Scannex Electronics Ltd.
    * Fix failures in MPI on Sparc(64) due to use of bad assembly code.
      Found by Kurt Danielson. #292
+   * Fix typo in name of the extKeyUsage OID. Found by inestlerode, #314
 
 Changes
    * Improved performance of mbedtls_ecp_muladd() when one of the scalars is 1