update workflow

Author: Ariana Barzinpour

.github/workflows/main.yml

@@ -149,7 +149,7 @@ jobs:
       run: |
         echo "Launching test db"
         pgdata=$(pwd)/.dbdata
-        initdb -D ${pgdata} --auth-host=md5 --encoding=UTF8
+        /usr/lib/postgresql/16/bin/initdb -D ${pgdata} --auth-host=md5 --encoding=UTF8
         pg_ctl -D ${pgdata} -l "${pgdata}/pg.log" start
         createdb datacube
         datacube system init
@@ -232,7 +232,7 @@ jobs:
       run: |
         echo "Launching test db"
         pgdata=$(pwd)/.dbdata
-        initdb -D ${pgdata} --auth-host=md5 --encoding=UTF8
+        /usr/lib/postgresql/16/bin/initdb -D ${pgdata} --auth-host=md5 --encoding=UTF8
         pg_ctl -D ${pgdata} -l "${pgdata}/pg.log" start
         createdb datacube
         datacube system init