expired key in junio-gpg-pub

It looks like your signing key is expired, and tag verification fails:

  $ mkdir /tmp/foo
  $ export GNUPGHOME=/tmp/foo
  $ git cat-file blob junio-gpg-pub | gpg --import
  gpg: WARNING: unsafe permissions on homedir '/tmp/foo'
  gpg: keybox '/tmp/foo/pubring.kbx' created
  gpg: key 20D04E5A713660A7: 27 signatures not checked due to missing keys
  gpg: /tmp/foo/trustdb.gpg: trustdb created
  gpg: key 20D04E5A713660A7: public key "Junio C Hamano [off-list ref]" imported
  gpg: Total number processed: 1
  gpg:               imported: 1
  gpg: no ultimately trusted keys found

  $ git tag -v v2.33.0
  object 225bc32a989d7a22fa6addafd4ce7dcd04675dbf
  type commit
  tag v2.33.0
  tagger Junio C Hamano [off-list ref] 1629141357 -0700

  Git 2.33
  gpg: WARNING: unsafe permissions on homedir '/tmp/foo'
  gpg: Signature made Mon Aug 16 15:15:57 2021 EDT
  gpg:                using RSA key E1F036B1FEE7221FC778ECEFB0B5E88696AFE6CB
  gpg: Good signature from "Junio C Hamano [off-list ref]" [unknown]
  gpg:                 aka "Junio C Hamano [off-list ref]" [unknown]
  gpg:                 aka "Junio C Hamano [off-list ref]" [unknown]
  gpg: Note: This key has expired!
  Primary key fingerprint: 96E0 7AF2 5771 9559 80DA  D100 20D0 4E5A 7136 60A7
       Subkey fingerprint: E1F0 36B1 FEE7 221F C778  ECEF B0B5 E886 96AF E6CB

  $ echo $?
  1

Have you extended the expiration on it? I wasn't able to find any
updates on the keyservers I checked. But regardless, we should probably
ship an updated one via the tag.

-Peff