Describe this workflow, not the Instagram one it was ported from

The header block and the scrape job's name still said "one post from nasa" and
"Fetch the posts", inherited from the Instagram twin. Both are the first thing
a maintainer reads, and in this repository they named the wrong thing entirely.

No behaviour changes.

Author: anil-bd

.github/workflows/live.yml

@@ -1,12 +1,12 @@
 # The only workflow that calls the real API. Needs the BRIGHTDATA_API_TOKEN
-# secret and spends about one credit per post.
+# secret and spends about one credit per profile.
 #
 # Four ways it runs:
-#   on every push to main: one post from nasa and the README's links, one
-#     credit and about three minutes, so a broken commit shows up at once.
+#   on every push to main: one profile and the README's links, one
+#     credit and about a minute, so a broken commit shows up at once.
 #     A newer push cancels a run still going for an older commit.
 #   by hand, from the Actions tab, to scrape whatever accounts you choose
-#   every day at 06:00 UTC except Monday: one post from nasa, the async
+#   every day at 06:00 UTC except Monday: one profile, the async
 #     path, and the field table, about two credits
 #   every Monday at 06:00 UTC: the same, plus every code block in the README,
 #     about 35 credits and 30 minutes
@@ -50,12 +50,12 @@ concurrency:
 
 jobs:
   scrape:
-    name: Fetch the posts and attach them to this run
+    name: Fetch the profiles and attach them to this run
     runs-on: ubuntu-latest
     timeout-minutes: 30  # fetch, async path, table; the README blocks have their own jobs
     env:
       BRIGHTDATA_API_TOKEN: ${{ secrets.BRIGHTDATA_API_TOKEN }}
-      # On the daily schedule there are no inputs, so fall back to one cheap post.
+      # On the daily schedule there are no inputs, so fall back to one cheap profile.
       PROFILES: ${{ inputs.profiles || 'satyanadella' }}
       # the async path and the field table run on every scheduled run and on request
       CHECK: ${{ github.event_name == 'schedule' || inputs.validate }}