update saxon, update pip invocation

build.xml

@@ -106,6 +106,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
     <!-- https://www.saxonica.com/html/documentation11/about/index.html      -->
     <!-- https://www.saxonica.com/html/documentation11/using-xsl/commandline -->
+    <!-- https://sourceforge.net/projects/saxon/files/Saxon-HE/11/Java       -->
     <property name="saxon.dir"        location="../../../tools/jar" description="relative path from archive examples/Subdirectory"/>
     <property name="saxon.jar"           value="saxon-he-11.2.jar"/><!-- previously saxon-he-10.6.jar saxon9he.jar -->
 
@@ -4353,8 +4354,12 @@ app.replica.args=-mode scene -mipmaps -antialias 8 -anisotropicDegree 16 -verbos
             <arg value="x3d"/>
         </exec>
         -->
-        <echo message="pip show x3d"/>
-        <exec executable="pip"  dir="." vmlauncher="false" timeout="${timeout}">
+        
+        <!-- exec executable="pip"  dir="." vmlauncher="false" timeout="${timeout}" -->
+        <echo message="python -m pip show x3d"/>
+        <exec executable="python" dir="." vmlauncher="false" timeout="${timeout}">
+            <arg value="-m"/>
+            <arg value="pip"/>
             <arg value="show"/><!-- verbose -->
             <arg value="x3d"/>
         </exec>