Prepare next development cycle for 2.1.0-SNAPSHOT

api/pom.xml

diff --git a/api/pom.xml b/api/pom.xml
index 964b4e6..57c0978 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -29,7 +29,7 @@
 
     <groupId>jakarta.annotation</groupId>
     <artifactId>jakarta.annotation-api</artifactId>
-    <version>2.1.0</version>
+    <version>2.1.0-SNAPSHOT</version>
 
     <name>Jakarta Annotations API</name>
     <description>Jakarta Annotations API</description>