fix headings for breaking changes

 ## 5.0.0-beta.1
 ## 5.0.0-beta.1
 
 
-BREAKING CHANGES:
+**BREAKING CHANGES:**
 
 
 * Flutter 3.19.0 is now required.
 * Flutter 3.19.0 is now required.
 * The `width` and `height` of `BarcodeCapture` have been removed, in favor of `size`.
 * The `width` and `height` of `BarcodeCapture` have been removed, in favor of `size`.
@@ -31,7 +31,9 @@ Bugs fixed:
 * [iOS] Fixed a crash with a nil capture session when starting the camera. (thanks @navaronbracke !)
 * [iOS] Fixed a crash with a nil capture session when starting the camera. (thanks @navaronbracke !)
 
 
 ## 4.0.0
 ## 4.0.0
-BREAKING CHANGES:
+
+**BREAKING CHANGES:**
+
 * [Android] compileSdk has been upgraded to version 34.
 * [Android] compileSdk has been upgraded to version 34.
 * [Android] Java version has been upgraded to version 17.
 * [Android] Java version has been upgraded to version 17.
 
 
@@ -214,7 +216,8 @@ Deprecated:
 * The `onStart` method has been renamed to `onScannerStarted`.
 * The `onStart` method has been renamed to `onScannerStarted`.
 * The `onPermissionSet` argument of the `MobileScannerController` is now deprecated.
 * The `onPermissionSet` argument of the `MobileScannerController` is now deprecated.
 
 
-Breaking changes:
+**BREAKING CHANGES:**
+
 * `MobileScannerException` now uses an `errorCode` instead of a `message`.
 * `MobileScannerException` now uses an `errorCode` instead of a `message`.
 * `MobileScannerException` now contains additional details from the original error.
 * `MobileScannerException` now contains additional details from the original error.
 * Refactored `MobileScannerController.start()` to throw `MobileScannerException`s
 * Refactored `MobileScannerController.start()` to throw `MobileScannerException`s
@@ -251,7 +254,9 @@ Fixes:
 * [iOS] Fix crash when changing torch state
 * [iOS] Fix crash when changing torch state
   
   
 ## 3.0.0-beta.2
 ## 3.0.0-beta.2
-Breaking changes:
+
+**BREAKING CHANGES:**
+
 * The arguments parameter of onDetect is removed. The data is now returned by the onStart callback
 * The arguments parameter of onDetect is removed. The data is now returned by the onStart callback
 in the MobileScanner widget.
 in the MobileScanner widget.
 * onDetect now returns the object BarcodeCapture, which contains a List of barcodes and, if enabled, an image.
 * onDetect now returns the object BarcodeCapture, which contains a List of barcodes and, if enabled, an image.
@@ -271,7 +276,9 @@ Other improvements:
 * [iOS] Updated POD dependencies
 * [iOS] Updated POD dependencies
 
 
 ## 3.0.0-beta.1
 ## 3.0.0-beta.1
-Breaking changes:
+
+**BREAKING CHANGES:**
+
 * [Android] SDK updated to SDK 33.
 * [Android] SDK updated to SDK 33.
 
 
 Features:
 Features:
@@ -287,7 +294,9 @@ Other changes:
 * Several minor code improvements
 * Several minor code improvements
 
 
 ## 2.0.0
 ## 2.0.0
-Breaking changes:
+
+**BREAKING CHANGES:**
+
 This version is only compatible with flutter 3.0.0 and later.
 This version is only compatible with flutter 3.0.0 and later.
 
 
 ## 1.1.2-play-services
 ## 1.1.2-play-services
@@ -321,7 +330,9 @@ Bugfixes:
 * Upgraded several dependencies.
 * Upgraded several dependencies.
 
 
 ## 1.0.0
 ## 1.0.0
-BREAKING CHANGES:
+
+**BREAKING CHANGES:**
+
 This version adds a new allowDuplicates option which now defaults to FALSE. this means that it will only call onDetect once after a scan.
 This version adds a new allowDuplicates option which now defaults to FALSE. this means that it will only call onDetect once after a scan.
 If you still want duplicates, you can set allowDuplicates to true.
 If you still want duplicates, you can set allowDuplicates to true.
 This also means that you don't have to check for duplicates yourself anymore.
 This also means that you don't have to check for duplicates yourself anymore.