Incrementing VERSION to 102.0.5005.91

Change-Id: Iaf95359393cfbe1deb1af9d39acbc96cf9b72e36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3672941
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5005@{#1067}
Cr-Branched-From: 5b4d945-refs/heads/main@{#992738}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=102
 MINOR=0
 BUILD=5005
-PATCH=90
+PATCH=91