Add Buy On Google to `graveyard.json`

Adds Buy On Google to the graveyard.

Link to earliest article of Buy On Google announcement I could find: https://feedonomics.com/blog/what-is-buy-on-google/

Lots of articles for shutdown of the program, official article: https://support.google.com/merchants/answer/13644745

Used Wayback Machine to save the support link to ensure the page live forever.

Tests:

(base) ➜  killedbygoogle git:(ssyed/bog) ✗ yarn test
yarn run v1.22.21
$ jest graveyard.test.ts
 PASS  ./graveyard.test.ts
  graveyard.json
    ✓ All values are complete (50 ms)
    ✓ Only allowed categories (8 ms)
    ✓ Unique product names (2 ms)
    Dates
      ✓ Formatted correctly (yyyy-mm-dd) (61 ms)
      ✓ Dates are valid (27 ms)
      ✓ `dateClose` is after `dateOpen` (15 ms)

Test Suites: 1 passed, 1 total
Tests:       6 passed, 6 total
Snapshots:   0 total
Time:        0.462 s, estimated 1 s
Ran all test suites matching /graveyard.test.ts/i.
✨  Done in 1.40s.

codyogden / killedbygoogle

Add Buy On Google to `graveyard.json` #1492