BumpOSS to v1.81 (#609)

Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>

Author: barnstar

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/tailscale/wireguard-go v0.0.0-20250107165329-0b8b35511f19
 	golang.org/x/mobile v0.0.0-20240806205939-81131f6468ab
 	inet.af/netaddr v0.0.0-20220617031823-097006376321
-	tailscale.com v1.79.0-pre.0.20250129204401-8bd04bdd3a6c
+	tailscale.com v1.81.0-pre
 )
 
 require (

go.sum

@@ -248,5 +248,5 @@ inet.af/netaddr v0.0.0-20220617031823-097006376321 h1:B4dC8ySKTQXasnjDTMsoCMf1sQ
 inet.af/netaddr v0.0.0-20220617031823-097006376321/go.mod h1:OIezDfdzOgFhuw4HuWapWq2e9l0H9tK4F1j+ETRtF3k=
 software.sslmate.com/src/go-pkcs12 v0.4.0 h1:H2g08FrTvSFKUj+D309j1DPfk5APnIdAQAB8aEykJ5k=
 software.sslmate.com/src/go-pkcs12 v0.4.0/go.mod h1:Qiz0EyvDRJjjxGyUQa2cCNZn/wMyzrRJ/qcDXOQazLI=
-tailscale.com v1.79.0-pre.0.20250129204401-8bd04bdd3a6c h1:+lq5wrWt/EaHJgVOK3kfti02zZey6sKftdAi5FaOTIQ=
-tailscale.com v1.79.0-pre.0.20250129204401-8bd04bdd3a6c/go.mod h1:4tasV1xjJAMHuX2xWMWAnXEmlrAA6M3w1xnc32DlpMk=
+tailscale.com v1.81.0-pre h1:GwJX1WdApig0qmXttUM6xQ+7Xsc/8BeLBSbOJwJdZkQ=
+tailscale.com v1.81.0-pre/go.mod h1:4tasV1xjJAMHuX2xWMWAnXEmlrAA6M3w1xnc32DlpMk=