CLDC-4269: update hhmemb question

app/models/form/lettings/questions/hhmemb.rb

@@ -5,7 +5,7 @@ class Form::Lettings::Questions::Hhmemb < ::Form::Question
     @type = "numeric"
     @width = 2
     @check_answers_card_number = 0
-    @max = 8
+    @max = 15
     @min = 1
     @step = 1
     @question_number = get_question_number_from_hash(QUESTION_NUMBER_FROM_YEAR)

config/locales/forms/2025/lettings/household_characteristics.en.yml

@@ -7,7 +7,7 @@ en:
             page_header: ""
             check_answer_label: "Number of household members"
             check_answer_prompt: "Enter total number of household members"
-            hint_text: "You can provide details for a maximum of 8 people."
+            hint_text: "You can answer up to 15 people. You will be asked to add details for a maximum of 8 people in the next questions."
             question_text: "How many people live in the household for this letting?"
 
           age1:

config/locales/forms/2026/lettings/household_characteristics.en.yml

@@ -7,7 +7,7 @@ en:
             page_header: ""
             check_answer_label: "Number of household members"
             check_answer_prompt: "Enter total number of household members"
-            hint_text: "You can provide details for a maximum of 8 people."
+            hint_text: "You can answer up to 15 people. You will be asked to add details for a maximum of 8 people in the next questions."
             question_text: "How many people live in the household for this letting?"
 
           age1: