deps: update dependency com.diffplug.spotless:spotless-maven-plugin to v2.46.0

Author: renovate-bot

google-cloud-firestore/pom.xml

@@ -291,7 +291,7 @@
       <plugin>
         <groupId>com.diffplug.spotless</groupId>
         <artifactId>spotless-maven-plugin</artifactId>
-        <version>2.45.0</version>
+        <version>2.46.0</version>
         <configuration>
           <kotlin>
             <includes>