CI failure on bitreq docs

[jamillambert]

There is an unrelated CI failure in a PR that looks like it is a rustdoc issue in bitreq, possibly from a bad response from example.com:

---- bitreq/src/lib.rs - (line 73) stdout ----
Test executable failed (exit status: 101).

stderr:

thread 'main' (8704) panicked at bitreq/src/lib.rs:8:1:
assertion `left == right` failed
  left: 200
 right: 403
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace



failures:
    bitreq/src/lib.rs - (line 73)

test result: FAILED. 12 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.40s

I reran the test and it passed on the third time, but now on a second PR it fails for stable and nightly with the same error message.