Change the term Ticket to Issue

Our new bugtracker no more uses the term Ticket but Issue for bug reports.

Fixes #9292

source/lib/allocators/DynamicArena.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2025 Wildfire Games.
+/* Copyright (C) 2026 Wildfire Games.
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
@@ -128,7 +128,7 @@ public:
 
 	void* allocate(size_t n, size_t alignment)
 	{
-		// Safely handle zero-sized allocations (happens with GCC STL - see ticket #909).
+		// Safely handle zero-sized allocations (happens with GCC STL - see Issue #909).
 		if (n == 0)
 			n = 1;
 

source/simulation2/components/tests/test_TerritoryManager.h

@@ -256,7 +256,7 @@ public:
 
 	void test_nested_boundaries1()
 	{
-		// test case from ticket #918; contains single-tile territories with double borders
+		// test case from Issue #918; contains single-tile territories with double borders
 		Grid<std::uint8_t> grid1 = GetGrid("--------"
 		                         "-111111-"
 								 "-1-1213-"