Fix sw8 loss when use aiohttp.

[Forstwith]

Fix sw8 loss when use aiohttp.
In /plugins/sw_aiohttp.py
When headers is not MultiDictProxy or MultiDict , headers = CIMultiDict(headers) make the headers not the same object as kwargs['headers'] . Therefore, the carrier information is not added to the actual sent headers

if headers is None:
    headers = kwargs['headers'] = CIMultiDict()
elif not isinstance(headers, (MultiDictProxy, MultiDict)):
    headers = CIMultiDict(headers)
    kwargs['headers'] = headers     # add this line to add headers back.
for item in carrier:
    headers.add(item.key, item.val)

Fix

• Add a unit test to verify that the fix works.
• Explain briefly why the bug exists and how to fix it.

• If this pull request closes/resolves/fixes an existing issue, replace the issue url. Closes:[ ]([Bug] Loss sw8 when use aiohttp send dict headers skywalking#10669)
• Update the CHANGELOG.md.

[wu-sheng]

You at least missed to update change log file.
Please read PR template.

[wu-sheng]

Why close?

[Forstwith]

Why close?
I want to add a changelog, and then reopen

[wu-sheng]

You don't need to close/reopen, just update on your branch.

[Forstwith]

Yes, thanks for letting me know that I don't have to close/reopen. I've added the changelog, and reopened.

[Superskyyy]

Hello，you should move the changelog to 1.1.0 as 1.0.0 was already released.

[Forstwith]

Hello，you should move the changelog to 1.1.0 as 1.0.0 was already released.

I saw that @wu-sheng has updated it for me, many thanks. I see that one of the unit tests is failing, is there anything I can do?