Update Sonar Key + Fix docs for build version

Author: tshan10

README.md

@@ -35,7 +35,7 @@ Mustang uses an inverted list data structure adapted from ranked information ret
 <dependency>
   <groupId>com.phonepe</groupId>
   <artifactId>mustang-core</artifactId>
-  <version>3.0.1</version>
+  <version>${mustang.version}</version>
 </dependency>
 ```
 
@@ -45,10 +45,12 @@ Mustang uses an inverted list data structure adapted from ranked information ret
 <dependency>
   <groupId>com.phonepe</groupId>
   <artifactId>mustang-dw-bundle</artifactId>
-  <version>3.0.1</version>
+  <version>${mustang.version}</version>
 </dependency>
 ```
 
+> **Note:** Find the latest version on [Maven Central](https://search.maven.org/artifact/com.phonepe/mustang).
+
 ---
 
 ## Overview

docs/docs/dropwizard.md

@@ -10,10 +10,12 @@
 <dependency>
   <groupId>com.phonepe</groupId>
   <artifactId>mustang-dw-bundle</artifactId>
-  <version>3.0.1</version>
+  <version>${mustang.version}</version>
 </dependency>
 ```
 
+> **Note:** Find the latest version on [Maven Central](https://search.maven.org/artifact/com.phonepe/mustang-dw-bundle).
+
 ---
 
 ## Registration

docs/docs/getting-started.md

@@ -19,7 +19,7 @@ This guide takes you from zero to a running index and search in about 5 minutes.
     <dependency>
       <groupId>com.phonepe</groupId>
       <artifactId>mustang-core</artifactId>
-      <version>3.0.1</version>
+      <version>${mustang.version}</version>
     </dependency>
     ```
 
@@ -29,12 +29,14 @@ This guide takes you from zero to a running index and search in about 5 minutes.
     <dependency>
       <groupId>com.phonepe</groupId>
       <artifactId>mustang-dw-bundle</artifactId>
-      <version>3.0.1</version>
+      <version>${mustang.version}</version>
     </dependency>
     ```
 
     The DW bundle transitively includes `mustang-core`.
 
+> **Note:** Find the latest version on [Maven Central](https://search.maven.org/artifact/com.phonepe/mustang).
+
 ---
 
 ## 2. Create the engine

pom.xml

@@ -124,7 +124,7 @@
 
         <!-- Sonar / JaCoCo -->
         <jacoco.maven.plugin.version>0.8.7</jacoco.maven.plugin.version>
-        <sonar.projectKey>PhonePe_Mustang</sonar.projectKey>
+        <sonar.projectKey>PhonePe_mustang</sonar.projectKey>
         <sonar.organization>phonepe</sonar.organization>
         <sonar.host.url>https://sonarcloud.io</sonar.host.url>
         <sonar.sources>src/main</sonar.sources>