Update changelog info for release - v1.1.0
## In development
+
+## v1.1.0 - February 01, 2020
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- Set tshoot lesson images to use centos7 [#275](https://github.com/nre-learning/nrelabs-curriculum/pull/275)
- Added FRR PTR demo [#273](https://github.com/nre-learning/nrelabs-curriculum/pull/273)
- Fixed Cumulus PTR demo [#271](https://github.com/nre-learning/nrelabs-curriculum/pull/271)
