Add CHANGELOG

Signed-off-by: Till Maas <opensource@till.name>

CHANGELOG.md

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+# Changelog
+## [1.2.0] - 2020-08-26
+### Changes
+- Rename ethtool features to use underscores instead of dashes to support
+  Jinja2 dot notation
+### New features
+- Initial 802.1x authentication support (only EAP-TLS)
+- Wireless support
+- Handle OracleLinux as a RHEL clone
+- Remove dependency on ethtool command line tool
+- initscripts: Support creating and activating bond profiles in one run
+- Ignore up/down states if a profile is not defined and not present on the managed host
+- Document bond profiles
+### Bug fixes
+- NetworkManager: Always rollback checkpoint on failure
+- NetworkManager: Try to reapply changes to reduce network interruptions
+- initscripts: Fix dependencies for Fedora 32
+- Only log actual warnings as Ansible warnings