Add vendor directory to .gitignore (#4819)

jimmygchen · jimmygchen · commit 18f3edff0a9d · 2023-10-18T06:52:51.000Z
## Issue Addressed

The vendor directory gets populated after running `cargo vendor`. This directory should be ignored by VCS.
diff --git a/.gitignore b/.gitignore
@@ -1,4 +1,5 @@
 target/
+vendor/
 **/*.rs.bk
 *.pk
 *.sk
