revert junit bump to 6.0.0

Author: tballison

tika-parent/pom.xml

@@ -392,7 +392,8 @@
     <jsoup.version>1.21.2</jsoup.version>
     <jsr305.version>3.0.2</jsr305.version>
     <junit4.version>4.13.2</junit4.version>
-    <junit5.version>6.0.0</junit5.version>
+    <!-- junit 6.x requires jdk 17 -->
+    <junit5.version>5.13.4</junit5.version>
     <juniversalchardet.version>2.5.0</juniversalchardet.version>
     <junrar.version>7.5.5</junrar.version>
     <jwarc.version>0.32.0</jwarc.version>