Add missing lines into code block

This does not look right. Apparently, it should be like this?

Signed-off-by: rugk <rugk+git@posteo.de>

README.md

@@ -13,12 +13,13 @@ Starting from 01.10.2019 we will not actively develop our old library (v1), but
 v2 is using [OkHTTP](https://square.github.io/okhttp) and [DAV4jvm](https://gitlab.com/bitfireAT/dav4jvm) by [BitfireAT](https://www.bitfire.at/).
 Needed changes for projects using this library are:
 - change build.gradle
-  - add to android {…}: compileOptions {
+  - add to android
   ```kts
+    {…}: compileOptions {
         sourceCompatibility JavaVersion.VERSION_1_8
         targetCompatibility JavaVersion.VERSION_1_8
-  ```
     }
+  ```
   -  add to dependencies {…}:
   ```kts
      implementation "commons-httpclient:commons-httpclient:3.1@jar" // remove after entire switch to lib v2