Issue #23491: Implement PEP 441: Improving Python Zip Application Support

Thanks to Paul Moore for the PEP and implementation.
diff --git a/Doc/library/distribution.rst b/Doc/library/distribution.rst
index c4954d1..3e6e84b 100644
--- a/Doc/library/distribution.rst
+++ b/Doc/library/distribution.rst
@@ -12,3 +12,4 @@
    distutils.rst
    ensurepip.rst
    venv.rst
+   zipapp.rst