tailcfg: bump capver for earlier cryptokey panic fix [capver 106]

I should've bumped capver in 65fe0ba7b5 but forgot.

This lets us turn off the cryptokey routing change from control for
the affected panicky range of commits, based on capver.

Updates #13332
Updates tailscale/corp#20732

Change-Id: I32c17cfcb45b2369b2b560032330551d47a0ce0b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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