Spec link is invalid / broken
On https://sourcemaps.info/spec.html
Note! This is a copy of the standard. Any discrepencies should be resolved in favour of the Google Doc.
Clicking the "the standard" link gives this:

Is this site now the primary source of truth for the spec or is there another?
This is related to https://github.com/mozilla/source-map/issues/421, which has a proposed resolution of pointing back to https://sourcemaps.info/spec.html in PR https://github.com/mozilla/source-map/pull/425.
PS. discrepancies is also mispelled as discrepencies. Fixed in https://github.com/bugsnag/sourcemaps.info/pull/5.
I also updated https://wiki.developer.mozilla.org/en-US/docs/Web/HTTP/Headers/SourceMap to point to https://sourcemaps.info/spec.html rather than the broken Google Doc.