Fix case for PyPI in docs (#12364)

`PyPi` -> `PyPI`

dev/provider.yaml.schema.json

@@ -3,7 +3,7 @@
   "type": "object",
   "properties": {
     "package-name": {
-      "description": "Package name available under which the package is available in the PyPi repository.",
+      "description": "Package name available under which the package is available in the PyPI repository.",
       "type": "string"
     },
     "python-module": {

docs/provider-packages-ref.rst

@@ -43,7 +43,7 @@ Here's the list of the :doc:`provider packages <provider-packages>` and what the
 
     :Available versions: {% for version in package["versions"] %}``{{ version }}``{% if not loop.last %}, {% else %}.{% endif %}{%- endfor %}
 
-    :Reference: `PyPi repository <https://pypi.org/project/{{ package["package-name"] }}/>`__
+    :Reference: `PyPI Repository <https://pypi.org/project/{{ package["package-name"] }}/>`__
     {% if package["python-module"] %}
     :Python API Reference: :mod:`{{ package["python-module"] }}`
     {% endif %}