Add 3.120.0 to the list of known-bad versions (#1210)

Version 3.120.0 of Pulumi contains a P0 that means `Delete` operations
are largely broken. As a result, we'd really like to ensure it's used as
little as possible. This commit adds 3.120.0 to the list of "known-bad"
versions in the GitHub action, so that we'll force a download of a newer
version in the event that 3.120.0 is the default available.

src/libs/pulumi-cli.ts

@@ -19,6 +19,7 @@ function isKnownBadVersion(version: string): boolean {
     '3.66.0',
     '3.67.0',
     '3.67.1',
+    '3.120.0',
   ]);
   return knownBadVersions.has(version);
 }