GCI105 StringConcatenation slight improvement in documentation

Co-authored-by: DataLabGroupe-CreditAgricole <[email protected]>

Author: cleophass

src/main/rules/GCI105/python/GCI105.asciidoc

@@ -8,7 +8,7 @@ city = "New York"
 street = "5th Avenue"
 zip_code = "10001"
 address = ""
-address += city + ", " + street + zip_code  # Noncompliant: inefficient string concatenation
+address += city + ", " + street + ", " + zip_code  # Noncompliant: inefficient string concatenation
 ----
 
 In this example, the `+=` operation creates a new string object for each concatenation. When done repeatedly (e.g., in loops), this leads to excessive memory allocations and slower performance.
@@ -20,7 +20,8 @@ In this example, the `+=` operation creates a new string object for each concate
 # Using f-string for readability and performance
 city = "New York"
 street = "5th Avenue"
-address = f"{city}, {street}"
+zip_code = "10001"
+address = f"{city}, {street}, {zip_code}"  
 # or using str.join() for multiple string concatenations
 parts = ["New York", "5th Avenue", "10001"]
 address = ", ".join(parts)