[Infra] Set prettier version

Using a specific version of prettier enables better tracking of dependencies.

Author: rlazo

build.gradle.kts

@@ -64,7 +64,7 @@ fun Project.applySpotless() {
     format("styling") {
       target("src/**/*.md", "*.md", "docs/**/*.md")
       targetExclude("**/third_party/**", "src/test/resources/**", "release_report.md")
-      prettier().config(mapOf("printWidth" to 100, "proseWrap" to "always"))
+      prettier("3.6.2").config(mapOf("printWidth" to 100, "proseWrap" to "always"))
     }
   }
 }