fix duplicate tagged url

HISTORY.rst

@@ -8,11 +8,11 @@ Contributors to this version: Pascal Bourgault (:user:`aulemahal`), Juliette Lav
 
 Announcements
 ^^^^^^^^^^^^^
-* `xclim` no longer supports Python3.7. Code conventions and new features for Python3.8 (`PEP 569 <https://www.python.org/dev/peps/pep-0569/>`_) are now accepted. (:issue:`966`, :pull:`1000`).
+* `xclim` no longer supports Python3.7. Code conventions and new features for Python3.8 (`PEP 569`_) are now accepted. (:issue:`966`, :pull:`1000`).
 
 Breaking changes
 ^^^^^^^^^^^^^^^^
-* Python3.7 (`PEP 537 <https://www.python.org/dev/peps/pep-0537/>`_) support has been officially deprecated. Continuous integration testing is no longer run against this version of Python. (:issue:`966`, :pull:`1000`).
+* Python3.7 (`PEP 537`_) support has been officially deprecated. Continuous integration testing is no longer run against this version of Python. (:issue:`966`, :pull:`1000`).
 
 Bug fixes
 ^^^^^^^^^
@@ -28,6 +28,8 @@ Internal changes
 * Docstrings and documentation has been adjusted for grammar and typos. (:pull:`1000`).
 * ``sdba.utils.extrapolate_qm`` has been removed, as announced for xclim 0.33. (:pull:`1009`).
 
+.. _PEP 569: https://www.python.org/dev/peps/pep-0569/
+
 0.33.0 (2022-01-28)
 -------------------
 Contributors to this version: Trevor James Smith (:user:`Zeitsperre`), Pascal Bourgault (:user:`aulemahal`), Tom Keel (:user:`Thomasjkeel`), Jeremy Fyke (:user:`JeremyFyke`), David Huard (:user:`huard`), Abel Aoun (:user:`bzah`), Juliette Lavoie (:user:`juliettelavoie`), Yannick Rousseau (:user:`yrouranos`).
@@ -441,7 +443,7 @@ Internal Changes
 
 Announcements
 ^^^^^^^^^^^^^
-* `xclim` no longer supports Python3.6. Code conventions and new features from Python3.7 (`PEP 537 <https://www.python.org/dev/peps/pep-0537/#features-for-3-7>`_) are now accepted.
+* `xclim` no longer supports Python3.6. Code conventions and new features from Python3.7 (`PEP 537`_) are now accepted.
 
 New features and enhancements
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -471,6 +473,8 @@ Internal Changes
 * `pre-commit` linting checks now run formatting hook `black==21.4b2`.
 * Code cleaning (more accurate call signatures, more use of https links, docstring updates, and typo fixes).
 
+.. _PEP 537:  https://www.python.org/dev/peps/pep-0537/#features-for-3-7
+
 0.25.0 (2021-03-31)
 -------------------