streams: Fix util inspect for compression and decompression streams

Author: Mert Can Altin

lib/internal/webstreams/compression.js

@@ -78,7 +78,7 @@ class CompressionStream {
   }
 
   [kInspect](depth, options) {
-    customInspect(depth, options, 'CompressionStream', {
+    return customInspect(depth, options, 'CompressionStream', {
       readable: this.#transform.readable,
       writable: this.#transform.writable,
     });
@@ -128,7 +128,7 @@ class DecompressionStream {
   }
 
   [kInspect](depth, options) {
-    customInspect(depth, options, 'DecompressionStream', {
+    return customInspect(depth, options, 'DecompressionStream', {
       readable: this.#transform.readable,
       writable: this.#transform.writable,
     });