[FIX] base_comment_template: Make field truly company dependent

Previous field declaration was incorrect due to a typo, leading to non applying the
company dependent features.

Now everything is correct and the migration scripts care of moving data properly.

base_comment_template/migrations/12.0.3.0.0/pre-migration.py

@@ -0,0 +1,13 @@
+# Copyright 2020 Tecnativa - Pedro M. Baeza
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+from openupgradelib import openupgrade
+
+
+@openupgrade.migrate()
+def migrate(env, version):
+    cr = env.cr
+    table = 'res_partner'
+    old_column = 'property_comment_template_id'
+    new_column = openupgrade.get_legacy_name(old_column)
+    if openupgrade.column_exists(cr, table, old_column):
+        openupgrade.rename_columns(cr, {table: [(old_column, new_column)]})