chore: Update CHANGELOG.md (#2065)

Author: imaNNeo

CHANGELOG.md

@@ -4,6 +4,7 @@
 * **FEATURE** (by @3ph) Add `horizontalMirrored` and `verticalMirrored` properties in our `LabelDirection` enum which is used in ([HorizontalLineLabel](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/base_chart.md#HorizontalLineLabel) and [VerticalLineLabel](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/base_chart.md#VerticalLineLabel)), #1890
 * **FEATURE** (by @Vizten18) Add `cornerRadius` property in the [PieChartSectionData](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/pie_chart.md#piechartsectiondata), #1175
 * **IMPROVEMENT** (by @imaNNeo) Add convention and linter (checker) for PRs title and updated contributing guideline. We're gonna have automated changelog generation from the next release
+* **BUGFIX** (by @diymelvin) Fix inverted lowerBy/upperBy in error range calculation, #2031
 
 ## 1.1.1
 * **IMPROVEMENT** (by @imaNNeo) Upgrade `vector_math` dependency to `2.2.0`, #1985