Fix Sobek Object.Get(key) returns *[]any instead of []any

[inancgumus]

What?

Fixes Sobek Object.Get(key) returns *[]any instead of []any issue.

Why?

This was causing the test to fail with the latest k6 (~v0.55) after an update was made to Sobek or its dependencies.

--- FAIL: TestBrowserContextOptionsPermissions (0.00s)
    browser_context_options_test.go:21: 
        	Error Trace:	/home/runner/work/xk6-browser/xk6-browser/browser/browser_context_options_test.go:21
        	Error:      	"[]" should have 2 item(s), but has 0
        	Test:       	TestBrowserContextOptionsPermissions
    browser_context_options_test.go:22: 
        	Error Trace:	/home/runner/work/xk6-browser/xk6-browser/browser/browser_context_options_test.go:22
        	Error:      	Not equal: 
        	            	expected: []string{}
        	            	actual  : []string{"camera", "microphone"}
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1,2 +1,4 @@
        	            	-([]string) {
        	            	+([]string) (len=2) {
        	            	+ (string) (len=6) "camera",
        	            	+ (string) (len=10) "microphone"
        	            	 }
        	Test:       	TestBrowserContextOptionsPermissions
FAIL

Checklist

• I have performed a self-review of my code
• I have added tests for my changes
• I have commented on my code, particularly in hard-to-understand areas

Related PR(s)/Issue(s)

Updates #1516

[ankur22]

LGTM 🚀