Bump external/ubpf from `6616682` to `905f30e` (#3906)

Bumps [external/ubpf](https://github.com/iovisor/ubpf) from `6616682` to `905f30e`.
- [Commits](661668211e...905f30ea7d)

---
updated-dependencies:
- dependency-name: external/ubpf
  dependency-type: direct:production
...

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external/ubpf

@@ -1 +1 @@
-Subproject commit 661668211e0d654c1fc66f75a63d6a1739c2649c
+Subproject commit 905f30ea7d28166ea6e1d3f0b47dec6edcef7caf