docs(website): refer to 4.0.0

Author: osiegmar

docs/src/content/docs/guides/quickstart.mdx

@@ -15,15 +15,15 @@ To get started with FastCSV, add the following dependency to your project:
         ```kotlin
         // build.gradle.kts
         dependencies {
-            implementation("de.siegmar:fastcsv:3.7.0")
+            implementation("de.siegmar:fastcsv:4.0.0")
         }
         ```
     </TabItem>
     <TabItem label="Gradle/Groovy">
         ```groovy
         // build.gradle
         dependencies {
-            implementation 'de.siegmar:fastcsv:3.7.0'
+            implementation 'de.siegmar:fastcsv:4.0.0'
         }
         ```
     </TabItem>
@@ -33,7 +33,7 @@ To get started with FastCSV, add the following dependency to your project:
         <dependency>
             <groupId>de.siegmar</groupId>
             <artifactId>fastcsv</artifactId>
-            <version>3.7.0</version>
+            <version>4.0.0</version>
         </dependency>
         ```
     </TabItem>