README: note to add Maven Central to dependency repos as well

Author: greenrobot-team

README.md

@@ -192,14 +192,21 @@ plugins {
     alias(libs.plugins.kotlin.jvm) apply false
     alias(libs.plugins.kotlin.kapt) apply false
 }
+
+allprojects {
+    repositories {
+        // Add Maven Central to the dependency repositories
+        mavenCentral()
+    }
+}
 ```
 
 ```kotlin
 // settings.gradle.kts
 
 pluginManagement {
     repositories {
-        // Add the Maven Central repository
+        // Add Maven Central to the plugin repositories
         mavenCentral()
     }
 
@@ -255,14 +262,21 @@ plugins {
     // Add the plugin
     id("io.objectbox") version "5.2.0" apply false
 }
+
+allprojects {
+    repositories {
+        // Add Maven Central to the dependency repositories
+        mavenCentral()
+    }
+}
 ```
 
 ```kotlin
 // settings.gradle.kts
 
 pluginManagement {
     repositories {
-        // Add the Maven Central repository
+        // Add Maven Central to the plugin repositories
         mavenCentral()
     }
 
@@ -288,8 +302,8 @@ buildscript {
     // Define a variable for the plugin version
     val objectboxVersion by extra("5.2.0")
 
-    repositories { 
-        // Add the Maven Central repository       
+    repositories {
+        // Add Maven Central to the plugin repositories     
         mavenCentral()    
     }
 
@@ -298,6 +312,13 @@ buildscript {
         classpath("io.objectbox:objectbox-gradle-plugin:$objectboxVersion")
     }
 }
+
+allprojects {
+    repositories {
+        // Add Maven Central to the dependency repositories
+        mavenCentral()
+    }
+}
 ```
 
 </details>
@@ -312,7 +333,7 @@ buildscript {
     ext.objectboxVersion = "5.2.0"
   
     repositories {        
-        // Add the Maven Central repository
+        // Add Maven Central to the plugin repositories
         mavenCentral()    
     }
   
@@ -321,6 +342,13 @@ buildscript {
         classpath("io.objectbox:objectbox-gradle-plugin:$objectboxVersion")
     }
 }
+
+allprojects {
+    repositories {
+        // Add Maven Central to the dependency repositories
+        mavenCentral()
+    }
+}
 ```
 
 </details>