Fix: Update FindPostgreSQL.cmake to support Postgres 16 (#2181)

* Fix: added PostgreSQL 16 to the list of known versions in FindPostgreSQL.cmake

The gvm compiles only when used with PostgreSQL (Debian 16.2-1). The older version of PSQL (PSQL 15) isn't in Kali's rolling repo anymore.

* Fix: adjusted indentation in cmake file.

Co-authored-by: Matt Mundell <32057441+mattmundell@users.noreply.github.com>

cmake/FindPostgreSQL.cmake

@@ -87,7 +87,7 @@ set(PostgreSQL_ROOT_DIR_MESSAGE "Set the PostgreSQL_ROOT system variable to wher
 
 
 set(PostgreSQL_KNOWN_VERSIONS ${PostgreSQL_ADDITIONAL_VERSIONS}
-    "15" "14" "13" "12" "11" "10" "9.6" "9.5" "9.4" "9.3" "9.2" "9.1" "9.0" "8.4" "8.3" "8.2" "8.1" "8.0")
+    "16" "15" "14" "13" "12" "11" "10" "9.6" "9.5" "9.4" "9.3" "9.2" "9.1" "9.0" "8.4" "8.3" "8.2" "8.1" "8.0")
 
 # Define additional search paths for root directories.
 set( PostgreSQL_ROOT_DIRECTORIES