bpo-41233: Add links to errnos referenced in exceptions docs (GH-21380)

Co-authored-by: Andrew Kuchling <amk@amk.ca>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
(cherry picked from commit a74892cb2168d249d9a8c53fad605a5def9b41d4)

Co-authored-by: yyyyyyyan <24644216+yyyyyyyan@users.noreply.github.com>

Miss Islington (bot) committed 4y ago

3fa800d7a7a405f51e0e8c9b7dac2f2a75c17bb4

Parent: 6b4b892

Committed by GitHub <noreply@github.com> on 4/5/2022, 2:30:06 AM