Update module tailscale.com to v1.86.5

Author: renovate[bot]

go.mod

@@ -6,7 +6,7 @@ toolchain go1.24.5
 
 require (
 	golang.org/x/net v0.42.0
-	tailscale.com v1.86.4
+	tailscale.com v1.86.5
 )
 
 require (

go.sum

@@ -246,3 +246,5 @@ tailscale.com v1.84.3 h1:Ur9LMedSgicwbqpy5xn7t49G8490/s6rqAJOk5Q5AYE=
 tailscale.com v1.84.3/go.mod h1:6/S63NMAhmncYT/1zIPDJkvCuZwMw+JnUuOfSPNazpo=
 tailscale.com v1.86.4 h1:KHAmLyzVn50t2P5877wohBU0UPVeIMHC9XDzRw4Ycz4=
 tailscale.com v1.86.4/go.mod h1:Lm8dnzU2i/Emw15r6sl3FRNp/liSQ/nYw6ZSQvIdZ1M=
+tailscale.com v1.86.5 h1:yBtWFjuLYDmxVnfnvPbZNZcKADCYgNfMd0rUAOA9XCs=
+tailscale.com v1.86.5/go.mod h1:Lm8dnzU2i/Emw15r6sl3FRNp/liSQ/nYw6ZSQvIdZ1M=