Finish releasing v1.25.2.

Amp-Thread-ID: https://ampcode.com/threads/T-019cd360-7c24-70ca-9738-5de8653b4d02
Co-authored-by: Amp <amp@ampcode.com>

Author: steve-the-edwards

gradle.properties

@@ -8,8 +8,8 @@ android.useAndroidX=true
 systemProp.org.gradle.internal.publish.checksums.insecure=true
 
 GROUP=com.squareup.workflow1
-VERSION_NAME=1.25.2
-LAST_PUBLISHED_VERSION_NAME=1.25.1
+VERSION_NAME=1.26.0-SNAPSHOT
+LAST_PUBLISHED_VERSION_NAME=1.25.2
 
 POM_DESCRIPTION=Square Workflow