Incrementing VERSION to 98.0.4758.99

Change-Id: Ib29c5398360d0c5241749f10aa6fc7b558db39b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3454027
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4758@{#1132}
Cr-Branched-From: 4a2cf4b-refs/heads/main@{#950365}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=98
 MINOR=0
 BUILD=4758
-PATCH=98
+PATCH=99