docs: Contribution guidelines (#7443)

* docs: gender neutrality

* docs: gender neutrality

* docs: gender neutrality

* Update docs/docs/concepts/features/identity-brokering.md

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

* Update docs/docs/guides/integrate/login-ui/mfa.mdx

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

* Update docs/docs/guides/integrate/login-ui/passkey.mdx

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

* Update internal/static/i18n/en.yaml

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

* Update internal/static/i18n/en.yaml

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

---------

Co-authored-by: Tim Möhlmann <tim+github@zitadel.com>

internal/api/grpc/session/v2/session_integration_test.go

@@ -705,7 +705,7 @@ func TestServer_DeleteSession_own_session(t *testing.T) {
 	})
 	require.Error(t, err)
 
-	// delete the new (user1) session by himself
+	// delete the new (user1) session by themselves
 	_, err = Client.DeleteSession(Tester.WithAuthorizationToken(context.Background(), token1), &session.DeleteSessionRequest{
 		SessionId: createResp.GetSessionId(),
 	})

internal/command/user_human_password.go

@@ -214,7 +214,7 @@ func (c *Commands) PasswordCodeSent(ctx context.Context, orgID, userID string) (
 	return err
 }
 
-// PasswordChangeSent notification sent that user changed his password
+// PasswordChangeSent notification sent that user changed password
 func (c *Commands) PasswordChangeSent(ctx context.Context, orgID, userID string) (err error) {
 	if userID == "" {
 		return zerrors.ThrowInvalidArgument(nil, "COMMAND-pqlm2n", "Errors.User.UserIDMissing")

internal/static/i18n/en.yaml

@@ -570,7 +570,7 @@ EventTypes:
     removed: Target deleted
   user:
     added: User added
-    selfregistered: User registered himself
+    selfregistered: User registered themself
     initialization:
       code:
         added: Initialization code generated
@@ -609,7 +609,7 @@ EventTypes:
           failed: Secret check failed
     human:
       added: Person added
-      selfregistered: Person registered himself
+      selfregistered: Person registered themself
       avatar:
         added: Avatar added
         removed: Avatar removed