can't find reason for requirement on github.com/google/pprof

[mattvb91]

The latest version doesn't build anymore with caddy 2.6.4

#0 30.13 panic: internal error: can't find reason for requirement on github.com/google/[email protected]

Locking manually down to 1.3.0 works fine.

--with github.com/caddy-dns/[email protected]

Related to: https://github.com/caddyserver/caddy/issues/5301

[mholt]

Upstream bug: https://github.com/golang/go/issues/56494