Update dependencies.yaml to new pip index (#2042)

This PR changes all references to pypi.nvidia.com to pypi.anaconda.org/rapidsai-wheels-nightly.

Authors:
  - Vyas Ramasubramani (https://github.com/vyasr)

Approvers:
  - Ray Douglass (https://github.com/raydouglass)

URL: #2042

dependencies.yaml

@@ -183,6 +183,7 @@ dependencies:
           # pip recognizes the index as a global option for the requirements.txt file
           # This index is needed for rmm-cu{11,12}.
           - --extra-index-url=https://pypi.nvidia.com
+          - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
       - output_types: [conda, requirements, pyproject]
         matrices:
@@ -408,6 +409,7 @@ dependencies:
           # pip recognizes the index as a global option for the requirements.txt file
           # This index is needed for cudf and rmm.
           - --extra-index-url=https://pypi.nvidia.com
+          - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
       - output_types: [conda, requirements, pyproject]
         matrices:
@@ -455,6 +457,7 @@ dependencies:
           # pip recognizes the index as a global option for the requirements.txt file
           # This index is needed for cudf and rmm.
           - --extra-index-url=https://pypi.nvidia.com
+          - --extra-index-url=https://pypi.anaconda.org/rapidsai-wheels-nightly/simple
     specific:
       - output_types: [requirements, pyproject]
         matrices: