File paths dynamic (#2605)

# Description

Please provide a summary of the changes, including relevant motivation
and context.

Closes #(issue_number)

## Checklist

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have performed a self-review of my own code
- [ ] I have attached images of the change if it is UI based
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] If my code has heavily changed functionality I have updated
relevant docs on [Stirling-PDFs doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
- [ ] My changes generate no new warnings
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

---------

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Co-authored-by: a <a>

src/main/java/stirling/software/SPDF/utils/PDFToFile.java

@@ -9,6 +9,7 @@ import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Objects;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
@@ -64,7 +65,7 @@ public class PDFToFile {
                             .runCommandWithOutputHandling(command, tempOutputDir.toFile());
 
             // Get output files
-            List<File> outputFiles = Arrays.asList(tempOutputDir.toFile().listFiles());
+            File[] outputFiles = Objects.requireNonNull(tempOutputDir.toFile().listFiles());
 
             // Return output files in a ZIP archive
             fileName = pdfBaseName + "ToHtml.zip";