Prepare release jakarta.tck:jakarta-expression-language-tck:6.1.0-M1

tck/pom.xml

diff --git a/tck/pom.xml b/tck/pom.xml
index 6156945..a0db79b 100644
--- a/tck/pom.xml
+++ b/tck/pom.xml
@@ -28,7 +28,7 @@
 
     <groupId>jakarta.tck</groupId>
     <artifactId>jakarta-expression-language-tck</artifactId>
-    <version>6.1.0-SNAPSHOT</version>
+    <version>6.1.0-M1</version>
     <packaging>jar</packaging>
 
     <name>Jakarta Expression Language TCK</name>