Incrementing VERSION to 108.0.5340.4

Change-Id: I1a8ba1a6ea06ce11d3bd81a9a37e37919221897b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3935206
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5340@{#7}
Cr-Branched-From: bab736d-refs/heads/main@{#1054635}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=108
 MINOR=0
 BUILD=5340
-PATCH=3
+PATCH=4