HTML report crash when using standard input

[jcamiel]

Summary

HTML report crash when using standard input.

Steps to reproduce

$ echo 'HEAD https://hurl.dev' | hurl --report-html /tmp/
thread 'main' panicked at 'existing file: Os { code: 2, kind: NotFound, message: "No such file or directory" }', packages/hurl/src/report/mod.rs:29:68
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
zsh: done       echo 'HEAD https://hurl.dev' |
zsh: abort      hurl --report-html /tmp/

Output of checks

• Version (hurl --version):

$ hurl --version
hurl 2.0.1 libcurl/7.79.1 (SecureTransport) LibreSSL/3.3.6 zlib/1.2.11 nghttp2/1.45.1
Features (libcurl):  alt-svc AsynchDNS HSTS HTTP2 IPv6 Largefile libz NTLM NTLM_WB SPNEGO SSL UnixSockets
Features (built-in): brotli

• Operating system and version: All