Change deprecated method name for spotless (#1735)

Author: breedx-splk

buildSrc/src/main/kotlin/otel.spotless-conventions.gradle.kts

@@ -70,7 +70,7 @@ spotless {
       "*.sh",
       "src/**/*.properties",
     )
-    indentWithSpaces()
+    leadingTabsToSpaces()
     trimTrailingWhitespace()
     endWithNewline()
   }