sql: fix some help texts

a hiccup was introduced in cockroachdb#73802.

Release note: None

pkg/sql/parser/sql.y

@@ -1550,7 +1550,7 @@ alter_ddl_stmt:
 //   ALTER TABLE ... UNSPLIT ALL
 //   ALTER TABLE ... SCATTER [ FROM ( <exprs...> ) TO ( <exprs...> ) ]
 //   ALTER TABLE ... INJECT STATISTICS ...  (experimental)
-//   ALTER TABLE ... RELOCATE [ LEASE | VOTERS | NONVOTERS ] FOR <selectclause>  (experimental)
+//   ALTER TABLE ... RELOCATE [ LEASE | VOTERS | NONVOTERS ] <selectclause>  (experimental)
 //   ALTER TABLE ... PARTITION BY RANGE ( <name...> ) ( <rangespec> )
 //   ALTER TABLE ... PARTITION BY LIST ( <name...> ) ( <listspec> )
 //   ALTER TABLE ... PARTITION BY NOTHING
@@ -1806,7 +1806,7 @@ alter_range_stmt:
 //   ALTER INDEX ... UNSPLIT AT <selectclause>
 //   ALTER INDEX ... UNSPLIT ALL
 //   ALTER INDEX ... SCATTER [ FROM ( <exprs...> ) TO ( <exprs...> ) ]
-//   ALTER INDEX ... RELOCATE [ LEASE | VOTERS | NONVOTERS ] FOR <selectclause>
+//   ALTER INDEX ... RELOCATE [ LEASE | VOTERS | NONVOTERS ] <selectclause>
 //
 // Zone configurations:
 //   DISCARD