Increment IJ plugin snapshot version

Author: github-actions

intellij-plugin/gradle.properties

@@ -30,4 +30,4 @@ javaVersion=11
 kotlin.stdlib.default.dependency=false
 
 # Snapshot version, automatically incremented by the CI
-snapshotVersion=28
+snapshotVersion=29

intellij-plugin/snapshots/plugins.xml

@@ -1,8 +1,8 @@
 <plugins>
   <plugin
       id="com.apollographql.ijplugin"
-      url="https://repsy.io/mvn/bod/apollo-intellij-plugin/com/apollographql/apollo-intellij-plugin/4.0.0-SNAPSHOT.28/apollo-intellij-plugin-4.0.0-SNAPSHOT.28.zip"
-      version="4.0.0-SNAPSHOT.28">
+      url="https://repsy.io/mvn/bod/apollo-intellij-plugin/com/apollographql/apollo-intellij-plugin/4.0.0-SNAPSHOT.29/apollo-intellij-plugin-4.0.0-SNAPSHOT.29.zip"
+      version="4.0.0-SNAPSHOT.29">
     <idea-version since-build="212" until-build="223.*"/>
     <name>Apollo GraphQL (Snapshot)</name>
   </plugin>