[camera_android_camerax] Update Android minimum SDK version (#9945)
https://github.com/flutter/packages/pull/9853 bumped it to 23, so updating the README.
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diff --git a/packages/camera/camera/README.md b/packages/camera/camera/README.md
index 9f5e6e2..15d23d8 100644
--- a/packages/camera/camera/README.md
+++ b/packages/camera/camera/README.md
@@ -8,7 +8,7 @@
| | Android | iOS | Web |
|----------------|---------|-----------|------------------------|
-| **Support** | SDK 21+ | iOS 12.0+ | [See `camera_web `][1] |
+| **Support** | SDK 23+ | iOS 12.0+ | [See `camera_web `][1] |
## Features
@@ -37,10 +37,10 @@
### Android
-Change the minimum Android sdk version to 21 (or higher) in your `android/app/build.gradle` file.
+Change the minimum Android sdk version to 23 (or higher) in your `android/app/build.gradle` file.
```groovy
-minSdkVersion 21
+minSdk = 23
```
The endorsed [`camera_android_camerax`][2] implementation of the camera plugin built with CameraX has
