indentation fix

Author: rustagir

source/data-formats/serialization.txt

@@ -325,21 +325,21 @@ dependency to your project by using the :guilabel:`Gradle` and
       :tabid: Gradle
 
       .. code-block:: kotlin
-        :caption: build.gradle.kts
+         :caption: build.gradle.kts
 
-        implementation("org.jetbrains.kotlinx:kotlinx-datetime:{+kotlinx-dt-version+}")
+         implementation("org.jetbrains.kotlinx:kotlinx-datetime:{+kotlinx-dt-version+}")
 
    .. tab::
       :tabid: Maven
 
       .. code-block:: kotlin
-        :caption: pom.xml
+         :caption: pom.xml
 
-        <dependency>
-            <groupId>org.jetbrains.kotlinx</groupId>
-            <artifactId>kotlinx-datetime-jvm</artifactId>
-            <version>{+kotlinx-dt-version+}</version>
-        </dependency>
+         <dependency>
+             <groupId>org.jetbrains.kotlinx</groupId>
+             <artifactId>kotlinx-datetime-jvm</artifactId>
+             <version>{+kotlinx-dt-version+}</version>
+         </dependency>
 
 To learn more about this library, see the :github:`kotlinx-datetime repository
 </Kotlin/kotlinx-datetime>` on GitHub.