Improve translation source text (#4254)

* Improve translation source text

* Add migration file for translation

InvenTree/part/migrations/0094_alter_part_units.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.16 on 2023-01-25 02:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0093_auto_20230115_1404'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='part',
+            name='units',
+            field=models.CharField(blank=True, default='', help_text='Units of measure for this part', max_length=20, null=True, verbose_name='Units'),
+        ),
+    ]

InvenTree/part/models.py

@@ -950,7 +950,7 @@ class Part(InvenTreeBarcodeMixin, MetadataMixin, MPTTModel):
         max_length=20, default="",
         blank=True, null=True,
         verbose_name=_('Units'),
-        help_text=_('Stock keeping units for this part')
+        help_text=_('Units of measure for this part')
     )
 
     assembly = models.BooleanField(