Fix pointing to not existing version 3.2.6

I could not find the version 3.2.6 in maven central when I tried to use this dependency.

README.md

@@ -138,7 +138,7 @@ To use AssertJ integration, import
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-assertj</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -171,7 +171,7 @@ To use import
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -216,7 +216,7 @@ To use import
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-spring</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -260,7 +260,7 @@ Import
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-spring</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -283,7 +283,7 @@ To use import
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-spring</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -299,7 +299,7 @@ Import:
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-kotest</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```
@@ -365,7 +365,7 @@ For the other API styles you have to first import JsonPath support module
 <dependency>
     <groupId>net.javacrumbs.json-unit</groupId>
     <artifactId>json-unit-json-path</artifactId>
-    <version>3.2.6</version>
+    <version>3.2.7</version>
     <scope>test</scope>
 </dependency>
 ```