Bump versions to 1.9

PiperOrigin-RevId: 328160170

Author: cushon

Diff for: core/pom.xml

@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.googlejavaformat</groupId>
     <artifactId>google-java-format-parent</artifactId>
-    <version>1.9-SNAPSHOT</version>
+    <version>1.9</version>
   </parent>
 
   <artifactId>google-java-format</artifactId>

Diff for: pom.xml

@@ -28,7 +28,7 @@
   <groupId>com.google.googlejavaformat</groupId>
   <artifactId>google-java-format-parent</artifactId>
   <packaging>pom</packaging>
-  <version>1.9-SNAPSHOT</version>
+  <version>1.9</version>
 
   <modules>
     <module>core</module>