Update GitHub Actions workflows. (#56)

This PR was automatically generated by the
update-native-provider-workflows workflow in the pulumi/ci-mgmt repo,
from commit 8d27f1f4eb9d34f0b7ccf790b1d2e06b7fa92be6.

This also manually updates the makefile to add the PROVIDER_VERSION
argument.

---------

Co-authored-by: Daniel Bradley <daniel@pulumi.com>

.github/workflows/weekly-pulumi-update.yml

@@ -54,6 +54,10 @@ jobs:
       uses: actions/checkout@v4
       with:
         lfs: true
+    - name: Set Provider Version
+      uses: pulumi/provider-version-action@v1
+      with:
+        set-env: PROVIDER_VERSION
     - name: Unshallow clone for tags
       run: git fetch --prune --unshallow --tags
     - name: Install Go