Updated expired yarn.gpg key

[bmorelli25]

Summary

The doc build is failing with the following error:

11:34:09 INFO:docker build:
11:34:09 INFO:docker build:#16 [node_deps 4/7] RUN install_packages yarn=1.21.1-1
11:34:09 INFO:docker build:#16 sha256:4e42c1c198f70b74a946a1580aa10d8f3091ba434cd544764c88cded83248e4c
11:34:09 INFO:docker build:#16 5.590 W: GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
11:34:09 INFO:docker build:#16 5.590 E: The repository 'https://dl.yarnpkg.com/debian stable InRelease' is not signed.
11:34:09 INFO:docker build:#16 ERROR: executor failed running [/bin/sh -c install_packages yarn=1.21.1-1]: exit code: 100
11:34:09 INFO:docker build:
11:34:09 INFO:docker build:#21 [ruby_deps 1/6] RUN install_packages   bundler   ruby-dev make cmake gcc libc-dev patch
11:34:09 INFO:docker build:#21 sha256:dc9fd11ab7f8322558ed4666eb4fcbe894d6dba6d0c1281bf61496ad2987d2b9
11:34:09 INFO:docker build:#21 7.428 Selecting previously unselected package libarchive13:amd64.
11:34:09 INFO:docker build:#21 7.432 Preparing to unpack .../16-libarchive13_3.3.3-4+deb10u2_amd64.deb ...
11:34:09 INFO:docker build:#21 7.436 Unpacking libarchive13:amd64 (3.3.3-4+deb10u2) ...
11:34:09 INFO:docker build:#21 7.507 Selecting previously unselected package libnghttp2-14:amd64.
11:34:09 INFO:docker build:#21 7.510 Preparing to unpack .../17-libnghttp2-14_1.36.0-2+deb10u1_amd64.deb ...
11:34:09 INFO:docker build:#21 7.515 Unpacking libnghttp2-14:amd64 (1.36.0-2+deb10u1) ...
11:34:09 INFO:docker build:#21 CANCELED
....
11:34:09 INFO:docker build:------
11:34:09 INFO:docker build: > [node_deps 4/7] RUN install_packages yarn=1.21.1-1:
11:34:09 INFO:docker build:------
11:34:09 INFO:docker build:executor failed running [/bin/sh -c install_packages yarn=1.21.1-1]: exit code: 100
11:34:10 runbld>>> <<<<<<<<<<<< SCRIPT EXECUTION END <<<<<<<<<<<<

After removing the pinned version of Yarn, @lcawl noticed this error: The repository 'https://dl.yarnpkg.com/debian stable InRelease' is not signed..

yarn.gpg was previously updated two years ago in #2053.

I ran curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg locally and copied the output into the yarn.gpg file.