doc: fix broken link in dgram doc
Checklist
-
make -j4 test
(UNIX), orvcbuild test nosign
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
Affected core subsystem(s)
- doc
Description of change
Fixes a broken link in dgram doc
cluster
is referenced in dgram.bind()
but is missing in the list of references at the bottom of the doc markdown.