fix: install tofu in the pipelie

Signed-off-by: Gamunu Balagalla <gamunu@fastcode.io>

.github/workflows/build.yml

@@ -9,13 +9,20 @@ env:
 jobs:
   generate-provider-schemas:
     runs-on: ubuntu-latest
+    env:
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: Set up Go
         uses: actions/setup-go@cdcb36043654635271a94b9a6d1392de5bb323a7 # v5.0.1
         with:
           go-version-file: .go-version
+      - name: Install OpenTofu
+        uses: opentofu/setup-opentofu@v1
+        with:
+          tofu_wrapper: false
+          tofu_version: 1.8.0
       - name: Generate provider schemas
         run: |
           go generate ./internal/schemas