Added missing event-update-not-available in UpdaterEvents

[dkarski]

Document

[mmaietta]

Can you manually update the snapshot test file here to match the new file size? The size seems to always change depending on what files commits add/remove content to the code (and I don't know why)

Snapshot name: `posix smart unpack 2`

- Snapshot  - 2
+ Received  + 2

@@ -956,14 +956,14 @@
              },
              "LICENSE": Object {
                "size": 1069,
              },
              "abi_registry.json": Object {
-               "size": 1884,
+               "size": 1885,
              },
              "index.js": Object {
-               "size": 6099,
+               "size": 6391,
              },
              "package.json": Object {
                "size": 547,
              },
              "scripts": Object {
    at verifySmartUnpack (/root/project/test/src/BuildTest.ts:344:51)
    at /root/project/test/src/helpers/packTester.ts:147:9
    at executeFinally (/root/project/packages/builder-util/src/promise.ts:12:14)
    at assertPack (/root/project/test/src/helpers/packTester.ts:117:3)

[dkarski]

Can you manually update the snapshot test file here to match the new file size?

Please do it for me, because I don't even have the project downloaded 🙈

[mmaietta]

I've fixed the CI failure in another PR. Merging this one now