Update version to v1.17.28

[willhickey]

Nothing in the changeset except the version bump:

$ glol -1
c1d9bf959 2024-03-17 22:33:39 -0500  (HEAD -> version_bump_v1.17.28, origin/version_bump_v1.17.28)  will.hickey@anza.xyz Update version to v1.17.28
$ git diff v1.17..HEAD | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?(solana|agave).*1.17.27|^\+( \")?(solana|agave).*1.17.28|^-version|^\+version"t diff v1.17..HEAD | grep -vE "^ |^@@ |^--- |^\+\+\+ |^index |^diff |^-( \")?(solana|agave).*1.17.27|^\+( \")?(solana|agave).*1.17.28|^-version|^\+version
$