Fix broken links (#1279)

Author: di

source/guides/single-sourcing-package-version.rst

@@ -9,7 +9,7 @@ There are many techniques to maintain a single source of truth for the version
 number of your project:
 
 #.  Read the file in :file:`setup.py` and get the version. Example (from `pip setup.py
-    <https://github.com/pypa/pip/blob/main/setup.py#L11>`_)::
+    <https://github.com/pypa/pip/blob/main/setup.py>`_)::
 
         import codecs
         import os.path

source/specifications/index.rst

@@ -6,7 +6,7 @@ PyPA specifications
 This is a list of currently active interoperability specifications maintained
 by the Python Packaging Authority. The process for updating these standards,
 and for proposing new ones, is documented on
-`pypa.io <https://www.pypa.io/en/latest/specifications.html>`__.
+`pypa.io <https://www.pypa.io/en/latest/specifications/>`__.
 
 
 Package Distribution Metadata