necessary changes in jspecify subtree

changes.diff

diff --git a/jspecify/build.gradle b/jspecify/build.gradle
index 676ae28..3b21c79 100644
--- a/jspecify/build.gradle
+++ b/jspecify/build.gradle
@@ -1,13 +1,13 @@
 plugins {
     id 'java-library'
     id 'maven-publish'
-    id 'com.diffplug.gradle.spotless' version '3.28.1'
-    id 'net.ltgt.errorprone' version '1.1.1'
+    id 'com.diffplug.spotless'
+    id 'net.ltgt.errorprone'
     id 'org.javamodularity.moduleplugin' version '1.6.0'
 }
 
-apply from: "$rootDir/gradle/format.gradle"
-apply from: "$rootDir/gradle/publish.gradle"
+apply from: "gradle/format.gradle"
+apply from: "gradle/publish.gradle"
 
 repositories { mavenCentral() }
 
diff --git a/jspecify/gradle/format.gradle b/jspecify/gradle/format.gradle
index f540d3a..6c974d1 100644
--- a/jspecify/gradle/format.gradle
+++ b/jspecify/gradle/format.gradle
@@ -2,12 +2,11 @@ spotless {
     java {
         removeUnusedImports()
         googleJavaFormat()
-        licenseHeaderFile "$rootDir/gradle/license-header.java"
+        licenseHeaderFile "gradle/license-header.java"
     }
     groovyGradle {
         target '**/*.gradle'
         greclipse()
         indentWithSpaces()
-        paddedCell()
     }
 }