Rephrase changeLog entries

Rephrase the changeLog entries for clarity and capitalize RFC.
diff --git a/ChangeLog b/ChangeLog
index ce50950..f942ebb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -61,10 +61,11 @@
    * Add MBEDTLS_REMOVE_3DES_CIPHERSUITES to allow removing 3DES ciphersuites
      from the default list (enabled by default). See
      https://sweet32.info/SWEET32_CCS16.pdf.
-   * Add support for parsing subject alternative name, of type otherName,
-     HardwareModuleName, as defined in rfc 4108 section 5.
+   * Add support for parsing otherName entries in the Subject Alternative Name
+     X.509 certificate extension, as defined in RFC 4108 section 5.
    * Add support for parsing certificate policies extension, as defined in
-     rfc 5280 section 4.2.1.4. Currently only supports "Any Policy" policy.
+     RFC 5280 section 4.2.1.4. Currently, only the "Any Policy" policy is
+     supported.
 
 API Changes
    * Add a new X.509 API call `mbedtls_x509_parse_der_nocopy()`.