Update ExtractTechnicalMetadataJob.java

Author: bbpennel

deposit-app/src/main/java/edu/unc/lib/boxc/deposit/validate/ExtractTechnicalMetadataJob.java

@@ -337,7 +337,7 @@ private Document getFitsDocument(PID objPid, Path filePath) {
 
     /**
      * Creates a symlink to the provided stagedUri, where the symlink is sanitized of problematic characters
-     * and uses the label as the filename to ensure the original file extensions is present, if available.
+     * and uses the label as the filename to ensure the original file extension is present, if available.
      * @param objPid
      * @param stagedUriString
      * @param label