Bump codecov/codecov-action from 4 to 5

.github/workflows/ci.yml

@@ -108,13 +108,13 @@ jobs:
       # Upload coverage reports to Codecov
 
       - name: Upload coverage to codecov
-        uses: codecov/codecov-action@v4
+        uses: codecov/codecov-action@v5
         env:
           OS: "${{ matrix.os }}"
           PYTHON: "${{ matrix.python-version }}"
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          file: ./coverage.coverage-combine.xml
+          files: ./coverage.coverage-combine.xml
           disable_search: true
           flags: combined-src
           env_vars: OS,PYTHON

.readthedocs.yaml

@@ -5,7 +5,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.10"
+    python: "3.9"
 
 python:
   install:

requirements/docs.txt

@@ -27,3 +27,6 @@ matplotlib
 
 # Cleanup generated files
 pre_commit_hooks
+
+# TODO: revert this (https://github.com/plotly/Kaleido/issues/226)
+kaleido<0.4