[#1354] Use latest SWIG in canary dependency installs

Update the canary requirements to install the latest available `swig` package instead of the previously pinned 4.3.1 range.

Also extend the shared build action's pip cache dependency paths to include the `.github/workflows` requirement files so canary dependency changes correctly invalidate the pip cache and are reflected in CI.

Author: schaubh

.github/actions/build/action.yml

@@ -29,6 +29,9 @@ runs:
           requirements_dev.txt
           requirements_doc.txt
           requirements.txt
+          .github/workflows/requirements_dev.txt
+          .github/workflows/requirements_doc.txt
+          .github/workflows/requirements.txt
 
     - name: Setup system dependencies
       uses: ./.github/actions/setup