Collection Mixin: fix last_media_pk comparison

[jsmrcaga]

items is a list of Media, which are thus non subscriptable.

This PR fixes the access error by accessing directly to the pk property of Media.

---

Error for reference

    liked_posts = self.insta_client.liked_medias(
  File "/usr/local/lib/python3.10/site-packages/instagrapi/mixins/collection.py", line 94, in liked_medias
    return self.collection_medias("liked", amount, last_media_pk)
  File "/usr/local/lib/python3.10/site-packages/instagrapi/mixins/collection.py", line 188, in collection_medias
    return self.collection_medias_v1(
  File "/usr/local/lib/python3.10/site-packages/instagrapi/mixins/collection.py", line 158, in collection_medias_v1
    if last_media_pk and last_media_pk == item["media"]["pk"]:
TypeError: 'Media' object is not subscriptable

[subzeroid]

@jsmrcaga thank you!

[jsmrcaga]

Sure @subzeroid , thank you for the amazing package!
I'll keep an eye for the release containing this fix

[subzeroid]

Released 2.1.1
https://pypi.org/project/instagrapi/