gh-136135: Doc: Fix some broken links (GH-136137)

diff --git a/Doc/howto/functional.rst b/Doc/howto/functional.rst
index 78e56e0..053558e 100644
--- a/Doc/howto/functional.rst
+++ b/Doc/howto/functional.rst

@@ -1217,7 +1217,7 @@
 design approaches described in these chapters are applicable to functional-style
 Python code.
 
-https://www.defmacro.org/ramblings/fp.html: A general introduction to functional
+https://defmacro.org/2006/06/19/fp.html: A general introduction to functional
 programming that uses Java examples and has a lengthy historical introduction.
 
 https://en.wikipedia.org/wiki/Functional_programming: General Wikipedia entry

diff --git a/Doc/installing/index.rst b/Doc/installing/index.rst
index a46c1ca..3a485a4 100644
--- a/Doc/installing/index.rst
+++ b/Doc/installing/index.rst

@@ -188,7 +188,7 @@
    Once the Development & Deployment part of PPUG is fleshed out, some of
    those sections should be linked from new questions here (most notably,
    we should have a question about avoiding depending on PyPI that links to
-   https://packaging.python.org/en/latest/mirrors/)
+   https://packaging.python.org/en/latest/guides/index-mirrors-and-caches/)
 
 
 Common installation issues