MNT: Update allowed redirect for conda docs (Fixes #3348)

Author: dopplershift

docs/conf.py

@@ -447,7 +447,7 @@
 # Dictionary of URL redirects allowed
 linkcheck_allowed_redirects = {
     r'https://pint\.readthedocs\.io': r'https://pint\.readthedocs\.io/en/stable/',
-    r'https://conda.io/docs/': r'https://conda.io/en/latest/',
+    r'https://conda.io/docs/': r'https://conda.io/projects/conda/en/latest/',
     r'https://github.com/Unidata/MetPy/issues/new/choose': r'https://github.com/login.*choose',
     r'https://doi.org/.*': r'https://.*',
     r'https://gitter.im/Unidata/MetPy': r'https://app.gitter.im/.*MetPy.*',