[BUGFIX] SonarQube: Prefer .at(…) over [….length - index].

Complex index access patterns should be replaced with ".at()" method javascript:S7755

Author: Gonzalo Diaz

src/projecteuler/problem0007.js

@@ -23,7 +23,7 @@ function problem0007(_top) {
 
   console.log(`primes count: ${primes.length}`);
 
-  const answer = primes[primes.length - 1];
+  const answer = primes.at(-1);
 
   const cycles = i;
   console.log(`${_top} prime number is: ${answer} in ${cycles} cycles`);