Incrementing VERSION to 94.0.4590.4

Change-Id: I2be1a0ad151c9ca6543b5b4fc4eac788db052de8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3062979
Bot-Commit: Chrome Release Bot (LUCI) <chrome-official-brancher@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/4590@{#6}
Cr-Branched-From: 1466af5-refs/heads/master@{#906442}

chrome/VERSION

@@ -1,4 +1,4 @@
 MAJOR=94
 MINOR=0
 BUILD=4590
-PATCH=3
+PATCH=4