Add changelog and bump version in conf.py

Signed-off-by: Eduardo Apolinario <[email protected]>

CHANGELOG/CHANGELOG-v1.14.1.md

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+# Flyte 1.14.1 Release Notes
+
+* Update flytestdlib and affected tools (copilot) for missing config.
+
+## What's Changed
+* docs: Refactor merge sort code example to use literalinclude by @davidlin20dev in https://github.com/flyteorg/flyte/pull/6091
+* [DOCS] Using ImageSpec in ContainerTask by @machichima in https://github.com/flyteorg/flyte/pull/6095
+* Eager doc updates by @wild-endeavor in https://github.com/flyteorg/flyte/pull/6099
+* Revert "fix: return the config file not found error" by @eapolinario in https://github.com/flyteorg/flyte/pull/6100
+* Remove notes on deprecated Batch size by @wild-endeavor in https://github.com/flyteorg/flyte/pull/6102
+* Upstream: Add labels to published execution events by @katrogan in https://github.com/flyteorg/flyte/pull/6104
+* Fix: Make distributed error aggregation opt-in by @fg91 in https://github.com/flyteorg/flyte/pull/6103
+* Add default labels and annotations to Ray worker pods too. by @katrogan in https://github.com/flyteorg/flyte/pull/6107
+* Fix: Remove the default search dialog if it exists (on CMD + K) by @chmod77 in https://github.com/flyteorg/flyte/pull/6106
+
+## New Contributors
+* @chmod77 made their first contribution in https://github.com/flyteorg/flyte/pull/6106
+
+**Full Changelog**: https://github.com/flyteorg/flyte/compare/v1.14.0...v1.14.1