chore(docs): update compatibility table with supported RN versions with Fabric (software-mansion#2001)

## Description

So in
[discussion](software-mansion#1985 (comment))
of software-mansion#1985 I was just made aware that we did not
update supported react-native versions in our readme, leading to some
confusion.

## Changes

Updated the readme & also release notes of 3.28.0

## Test code and steps to reproduce

N/A

## Checklist

- [x] Ensured that CI passes

Author: kkafar

README.md

@@ -103,7 +103,7 @@ Screens are already integrated with the React Native's most popular navigation l
 
 ## Supported react-native version
 
-| version | react-native version |
+| library version | react-native version |
 | ------- | -------------------- |
 | 3.14.0+ | 0.64.0+              |
 | 3.0.0+  | 0.62.0+              |
@@ -113,13 +113,11 @@ Screens are already integrated with the React Native's most popular navigation l
 
 [Fabric](https://reactnative.dev/architecture/fabric-renderer) is React Native's new rendering system.
 
-- As of [version `3.21.0`](https://github.com/software-mansion/react-native-screens/releases/tag/3.21.0) of this project, Fabric is supported only for react-native 0.72+. Support for lower versions has been dropped.
-- As of [version `3.19.0`](https://github.com/software-mansion/react-native-screens/releases/tag/3.19.0) of this project, Fabric is supported only for react-native 0.71+. Support for lower versions has been dropped.
-- As of [version `3.18.0`](https://github.com/software-mansion/react-native-screens/releases/tag/3.18.0) of this project, Fabric is supported only for react-native 0.70+. Support for lower versions has been dropped.
-- As of [version `3.14.0`](https://github.com/software-mansion/react-native-screens/releases/tag/3.14.0) of this project, Fabric is supported only for react-native 0.69+. Support for lower versions has been dropped.
+Here's a table with summary of supported `react-native` versions when Fabric is turned on.
 
-| version | react-native version |
+| library version | react-native version |
 | ------- | -------------------- |
+| 3.28.0+ | 0.73.0+              |
 | 3.21.0+ | 0.72.0+              |
 | 3.19.0+ | 0.71.0+              |
 | 3.18.0+ | 0.70.0+              |