Postgreql 16 doc updates

[dgboss]

Postgresql@16 installed with brew doesn't play nice with postgis installed with brew. Updating mac.sh setup script and docs with alternative.

Test Links:

Landing Page MoreCast Percentile Calculator C-Haines FireBat FireBat bookmark Auto Spatial Advisory (ASA) HFI Calculator

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 80.40%. Comparing base (8aeeed6) to head (bbc7413). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4110 +/- ## ======================================= Coverage 80.40% 80.40% ======================================= Files 309 309 Lines 11860 11860 Branches 537 537 ======================================= Hits 9536 9536 Misses 2138 2138 Partials 186 186 ```

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