Update Python client CHANGELOG (#1437)

Author: rzats

src/client/packaging/pypi/CHANGELOG.md

@@ -3,6 +3,36 @@
 All notable future changes to the `delphi_epidata` python client will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
+## [4.1.21] - TBD
+
+### Includes
+- https://github.com/cmu-delphi/delphi-epidata/pull/1418
+
+### Added
+- Adds two debug flags:
+  - `debug` logs info about HTTP requests and responses
+  - `sandbox` prevents any HTTP requests from actually executing, allowing for tests that do not incur server load.
+
+## [4.1.17] - 2024-01-30
+
+### Includes
+- https://github.com/cmu-delphi/delphi-epidata/pull/1363
+
+### Changed
+- Replaced use of deprecated setuptools' `pkg_resources` library with the native `importlib.metadata` library.
+
+## [4.1.13] - 2023-11-04
+
+### Includes
+- https://github.com/cmu-delphi/delphi-epidata/pull/1323
+- https://github.com/cmu-delphi/delphi-epidata/pull/1330
+
+### Changed
+- Appends a trailing slash to URLs requested by the Python client, which should prevent an automatic redirect and an extra request to the server.
+
+### Removed
+- Removed the `covidcast_nowcast()` method, as the associated API endpoint is no longer available.
+
 ## [4.1.11] - 2023-10-12
 
 ### Includes

src/client/packaging/pypi/setup.py

@@ -13,7 +13,7 @@
     long_description_content_type="text/markdown",
     url="https://github.com/cmu-delphi/delphi-epidata",
     project_urls={
-        "Changelog": "https://github.com/cmu-delphi/delphi-epidata/blob/dev/src/client/packaging/pypi/CHANGELOG.md",
+        "Changelog": "https://github.com/cmu-delphi/delphi-epidata/blob/main/src/client/packaging/pypi/CHANGELOG.md",
     },
     packages=setuptools.find_packages(),
     install_requires=["aiohttp", "requests>=2.7.0", "tenacity"],