docs(blog): rename latest blog md to match pages index

General MR

Summary

This MR fixes the Big Bang blog.

Relevant logs/screenshots

Some proof that I named it right this time:

❯ file $(yq '.nav[0]' .pages | cut -d':' -f2 | xargs)
streamlining-integration-with-bb-common.md: Unicode text, UTF-8 text

Linked Issue

Closes #2921 (closed)

Upgrade Notices

N/A