fix: credentials.json is currently ignored in iojs.org folder

[UlisesGascon]

currently the credentials are stored in iojs.org/credentials.json. This prevent accidental commit them.

[richardlau]

That's odd -- the file is ignored for me without this change:

$ git rev-parse HEAD
1e1305a7b3d247e8c7335cb2182bb83273946a09
$ cat .gitignore
credentials.json
node_modules
$ git status --ignored
On branch main
Your branch is up to date with 'origin/main'.

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        update/package-lock.json

Ignored files:
  (use "git add -f <file>..." to include in what will be committed)
        iojs.org/credentials.json
        update/node_modules/

nothing added to commit but untracked files present (use "git add" to track)
$

[Trott]

Confirming what Richard wrote. The entry as it exists now should ignore credentials.json in all subdirectories so this change shouldn't be necessary. The git docs confirm that foo and **/foo will give the same result in a .gitignore file.

[UlisesGascon]

My fault, I made a mistake when I created the file name so that explains why the gitignore didn't act as I expected. Thanks for the review :)