fix: Aviation Test

[kingthorin]

Following the failure here: https://github.com/datafaker-net/datafaker/actions/runs/9324424830/job/25669623466#step:4:1

Which apparently only had a 1 in 4037 chance of happening on any given test run, lucky us 😀

I threw together this temporary test (I'm sure there are more elegant ways to do this, it was just a quick thing):

@Test
void checkLengths() {
	List<String> entries = getBaseList("aviation.airport");
	System.out.println(entries.size());
	Map<Integer, Integer> lenMap = new HashMap<>();
	lenMap.put(1, 0);
	lenMap.put(2, 0);
	lenMap.put(3, 0);
	lenMap.put(4, 0);
	lenMap.put(5, 0);
	lenMap.put(6, 0);
	for (String entry : entries) {
		Integer count = lenMap.get(entry.length());
		count++;
		lenMap.put(entry.length(), count);
		if (entry.length() != 4) {
			System.out.println(entry);
		}
	}
	System.out.println(lenMap);
}

Which produced:

4037
N55
{1=0, 2=0, 3=1, 4=4036, 5=0, 6=0}

Indeed N55 is a valid airport: https://www.google.com/search?q=N55+airport - Jaluit Airport

So I've adjusted the regex in the test to allow length 3 or 4.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.03%. Comparing base (b37c566) to head (ad08e81).
Report is 637 commits behind head on main.

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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1241      +/-   ##
============================================
- Coverage     92.35%   92.03%   -0.32%     
- Complexity     2821     3042     +221     
============================================
  Files           292      309      +17     
  Lines          5609     5987     +378     
  Branches        599      629      +30     
============================================
+ Hits           5180     5510     +330     
- Misses          275      319      +44     
- Partials        154      158       +4     

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