fix: correct typo and apply binary units standards

- Fix typo: lightweight (was leightweight) in l1
- Use GiB instead of GB in memory prompt per binary units rule

Author: NikolayS

sql/l1_lock_trees.sql

@@ -1,4 +1,4 @@
---Lock trees (leightweight)
+--Lock trees (lightweight)
 
 -- Source: https://github.com/dataegret/pg-utils/blob/master/sql/locktree.sql
 -- The paths won't be precise but this query is very light and may be used quite frequently

sql/t1_tuning.sql

@@ -42,7 +42,7 @@ select :postgres_dba_t1_location = 3 as postgres_dba_t1_location_rds \gset
 
 \echo
 \echo
-\echo 'Type total available memory (in GB): '
+\echo 'Type total available memory (in GiB): '
 \prompt postgres_dba_t1_memory
 
 \echo

start.psql

@@ -16,7 +16,7 @@
 \echo '  i3 – FKs with missing/bad indexes'
 \echo '  i4 – Invalid indexes'
 \echo '  i5 – Cleanup unused and redundant indexes – do & undo migration DDL'
-\echo '  l1 – Lock trees (leightweight)'
+\echo '  l1 – Lock trees (lightweight)'
 \echo '  l2 – Lock trees, detailed (based on pg_blocking_pids())'
 \echo '  p1 – [EXP] Alignment padding: how many bytes can be saved if columns are reordered?'
 \echo '  r1 – Create user with random password (interactive)'