Update CHANGELOG.md

CHANGELOG.md

@@ -1,7 +1,27 @@
 ## newVersion
 * **FEATURE** (by @julien4215) Add direction property to the [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), #1574
 * **FEATURE**  (by @apekshamehta) Added new method called getTooltipColor for axis charts (bar,line,scatter) to change background color of tooltip dynamically.[issue](https://github.com/imaNNeo/fl_chart/issues/1279).
-* **BREAKING** (by @apekshamehta) Removed tooltipBgColor property from Bar, Line and Scatter Charts.
+* **BREAKING** (by @apekshamehta) Removed tooltipBgColor property from Bar, Line and Scatter Charts (you can now use `getTooltipColor` which provides more customizability), checkout the [full migration guide here](https://github.com/imaNNeo/fl_chart/blob/main/repo_files/documentations/migration_guides/0.67.0/MIGRATION_00_67_00.md).
+```dart
+/// Migration guide:
+/// This is the old way:
+BarChartData(
+  barTouchData: BarTouchData(
+    touchTooltipData: BarTouchTooltipData(
+      tooltipBgColor: Colors.blueGrey,
+    )
+  )
+)
+
+/// This is the new way:
+BarChartData(
+  barTouchData: BarTouchData(
+    touchTooltipData: BarTouchTooltipData(
+      getTooltipColor: (BarChartGroupData group) => Colors.blueGrey,
+    )
+  )
+)
+```
 
 ## 0.66.2
 * **BUGFIX** (by @stwarwas) Remove dart.io to fix web platform issue, #1577