Update AGP to version 8.1.1

Removing the compileSdk 34 build warning:

```
We recommend using a newer Android Gradle plugin to use compileSdk = 34

This Android Gradle plugin (8.1.0) was tested up to compileSdk = 33 (and compileSdkPreview = \"UpsideDownCakePrivacySandbox\").

You are strongly encouraged to update your project to use a newer
Android Gradle plugin that has been tested with compileSdk = 34.

If you are already using the latest version of the Android Gradle plugin,
you may need to wait until a newer version with support for compileSdk = 34 is available.

To suppress this warning, add/update
    android.suppressUnsupportedCompileSdk=34
    to this project's gradle.properties.
```

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 accompanist = "0.28.0"
 androidDesugarJdkLibs = "2.0.3"
-androidGradlePlugin = "8.1.0"
+androidGradlePlugin = "8.1.1"
 androidxActivity = "1.8.0-alpha06"
 androidxAppCompat = "1.5.1"
 androidxBrowser = "1.4.0"