Update CHANGELOG.md for 1.6.2 release. [ci skip]

Author: mikedarcy

CHANGELOG.md

@@ -1,7 +1,7 @@
 # CHANGE LOG
 
 ## 1.6.2
-* Set "User-Agent" header for http fetch handler (requests) to `"bdbag/{version} (requests/{version}"`.
+* Set "User-Agent" header for HTTP fetch handler (via `python-requests`) to `"bdbag/{version} (requests/{version})"`.
 * Added `sha1` support for `bdbag_utils` function `create-rfm-from-url-list`. See PR [#46](https://github.com/fair-research/bdbag/pull/46).
 * Fix issues with unicode handling in `fetch.txt`, RO `metadata.json`, `keychain.json`, and `remote-file-manifest` JSON files.
 * Fix issues with over-escaping (urlencoding) of filenames and urls in `fetch.txt` and RO `metadata.json`.