added "(optional)" to instances of Street address 2 fields

src/registrar/forms/application_wizard.py

@@ -244,7 +244,7 @@ class OrganizationContactForm(RegistrarForm):
     )
     address_line2 = forms.CharField(
         required=False,
-        label="Street address line 2",
+        label="Street address line 2 (optional)",
     )
     city = forms.CharField(
         label="City",

src/registrar/migrations/0007_domainapplication_more_organization_information_and_more.py

@@ -31,7 +31,7 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name="domainapplication",
             name="address_line2",
-            field=models.CharField(blank=True, help_text="Street address line 2", max_length=15, null=True),
+            field=models.CharField(blank=True, help_text="Street address line 2 (optional)", max_length=15, null=True),
         ),
         migrations.AlterField(
             model_name="domainapplication",

src/registrar/migrations/0018_domaininformation.py

@@ -117,7 +117,7 @@ class Migration(migrations.Migration):
                     "address_line2",
                     models.CharField(
                         blank=True,
-                        help_text="Street address line 2",
+                        help_text="Street address line 2 (optional)",
                         max_length=15,
                         null=True,
                     ),

src/registrar/migrations/0026_alter_domainapplication_address_line2_and_more.py

@@ -12,11 +12,11 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name="domainapplication",
             name="address_line2",
-            field=models.TextField(blank=True, help_text="Street address line 2", null=True),
+            field=models.TextField(blank=True, help_text="Street address line 2 (optional)", null=True),
         ),
         migrations.AlterField(
             model_name="domaininformation",
             name="address_line2",
-            field=models.TextField(blank=True, help_text="Street address line 2", null=True),
+            field=models.TextField(blank=True, help_text="Street address line 2 (optional)", null=True),
         ),
     ]

src/registrar/migrations/0027_alter_domaininformation_address_line1_and_more.py

@@ -24,9 +24,9 @@ class Migration(migrations.Migration):
             name="address_line2",
             field=models.TextField(
                 blank=True,
-                help_text="Street address line 2",
+                help_text="Street address line 2 (optional)",
                 null=True,
-                verbose_name="Street address line 2",
+                verbose_name="Street address line 2 (optional)",
             ),
         ),
         migrations.AlterField(

src/registrar/models/domain_application.py

@@ -442,7 +442,7 @@ class DomainApplication(TimeStampedModel):
     address_line2 = models.TextField(
         null=True,
         blank=True,
-        help_text="Street address line 2",
+        help_text="Street address line 2 (optional)",
     )
     city = models.TextField(
         null=True,

src/registrar/models/domain_information.py

@@ -106,8 +106,8 @@ class DomainInformation(TimeStampedModel):
     address_line2 = models.TextField(
         null=True,
         blank=True,
-        help_text="Street address line 2",
-        verbose_name="Street address line 2",
+        help_text="Street address line 2 (optional)",
+        verbose_name="Street address line 2 (optional)",
     )
     city = models.TextField(
         null=True,