python3-werkzeug: added python3-difflib as RDEPENDS

File "/usr/lib/python3.12/site-packages/werkzeug/routing/exceptions.py", line 3, in <module>
    import difflib
ModuleNotFoundError: No module named 'difflib'

Signed-off-by: Jan Vermaete <jan.vermaete@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-python/recipes-devtools/python/python3-werkzeug_3.0.1.bb

@@ -20,4 +20,5 @@ RDEPENDS:${PN} += " \
     python3-profile \
     python3-compression \
     python3-json \
+    python3-difflib \
 "