manifest: Fix third_party/kernel branch to main-R105 BUG=b/268237065 TEST=None RELEASE_NOTE=None Change-Id: Ifd810e20f94b413564bde4314676c34ec82d1355 Reviewed-on: https://cos-review.googlesource.com/c/cos/manifest/+/42167 Reviewed-by: He Gao <hegao@google.com> Tested-by: Meena Shanmugam <meenashanmugam@google.com> Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>