feat(translation): add en translation for urn_rfc2141 (#1431)

## Fixes Or Enhances
Add en translation for urn_rfc2141

**Make sure that you've checked the boxes below before you submit PR:**
- [x] Tests exist or have been written that cover this particular
change.

@go-playground/validator-maintainers

Co-authored-by: Ryan Malesic <rymalesi@amazon.com>

Author: ryanmalesic

translations/en/en.go

@@ -1229,6 +1229,11 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 			translation: "{0} must be a valid ISSN number",
 			override:    false,
 		},
+		{
+			tag:         "urn_rfc2141",
+			translation: "{0} must be a valid RFC 2141 URN",
+			override:    false,
+		},
 		{
 			tag:         "uuid",
 			translation: "{0} must be a valid UUID",

translations/en/en_test.go

@@ -129,6 +129,7 @@ func TestTranslations(t *testing.T) {
 		ISBN10             string            `validate:"isbn10"`
 		ISBN13             string            `validate:"isbn13"`
 		ISSN               string            `validate:"issn"`
+		URN                string            `validate:"urn_rfc2141"`
 		UUID               string            `validate:"uuid"`
 		UUID3              string            `validate:"uuid3"`
 		UUID4              string            `validate:"uuid4"`
@@ -406,6 +407,10 @@ func TestTranslations(t *testing.T) {
 			ns:       "Test.ISSN",
 			expected: "ISSN must be a valid ISSN number",
 		},
+		{
+			ns:       "Test.URN",
+			expected: "URN must be a valid RFC 2141 URN",
+		},
 		{
 			ns:       "Test.Excludes",
 			expected: "Excludes cannot contain the text 'text'",