Fix link to Debian install instructions
Fix link to Debian install instructions

The link for the Debian install instructions was mistakenly pointing to
the RPM instructions. This commit fixes the reference.

Relates #23485

strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc,strapdata/elassandra5-rc