LibJS: Indent tests with 4 spaces instead of 2

Author: https://github.com/mattco98
Commit: 1ef573eb30
Pull-request: https://github.com/SerenityOS/serenity/pull/2689
Reviewed-by: https://github.com/linusg

Libraries/LibJS/Tests/const-reassignment.js

@@ -1,17 +1,17 @@
 // I'm not sure how this test passed before the refactor, but it definitely doesn't work at all
 test.skip("reassignment to const", () => {
-  const constantValue = 1;
-  expect(() => {
-    constantValue = 2;
-  }).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
-  expect(constantValue).toBe(1);
+    const constantValue = 1;
+    expect(() => {
+        constantValue = 2;
+    }).toThrowWithMessage(TypeError, "Invalid assignment to const variable");
+    expect(constantValue).toBe(1);
 });
 
 test("const creation in inner scope", () => {
-  const constantValue = 1;
-  do {
-    const constantValue = 2;
-    expect(constantValue).toBe(2);
-  } while (false);
-  expect(constantValue).toBe(1);
+    const constantValue = 1;
+    do {
+        const constantValue = 2;
+        expect(constantValue).toBe(2);
+    } while (false);
+    expect(constantValue).toBe(1);
 });