Default charge limit is `unlimited`

[barjin]

apify-sdk-js/test/e2e/sdk/actorCharge/test.mjs

Lines 61 to 66 in 6e48b85

	test('default charge limit 0', async () => {
	const run = await runActor({}, {});
	assert.strictEqual(run.status, 'SUCCEEDED');
	assert.deepEqual(run.chargedEventCounts, { foobar: 0 });
	});

This test is failing.

+{ foobar: 4 } 
-{ foobar: 0 } 

Looking at the run, it seems that passing no limit to the client now means "Unlimited" spending for the PPE Actor.

I'm not sure if this is a regression, a designed change, or even anything we can solve in SDK (might be an API update we didn't change our E2Es for yet).

cc @janbuchar