update diff-check.yml with correct repo path

.github/workflows/teamcity-services-diff-check.yml

@@ -33,23 +33,23 @@ jobs:
         with:
           repo: 'terraform-provider-google'
           token: '$GITHUB_TOKEN'
-      - run: export GOOGLE_REPO_PATH=$OUTPUT_PATH
+      - run: echo "GOOGLE_REPO_PATH=${{ env.OUTPUT_PATH}}" >> $GITHUB_ENV
       - name: TeamCity Google Beta Provider Generate
         if: steps.generate.outcome == 'success'
         uses: ./.github/actions/build-downstream
         with:
           repo: 'terraform-provider-google-beta'
           token: '$GITHUB_TOKEN'
-      - run: export GOOGLE_BETA_REPO_PATH=$OUTPUT_PATH
+      - run: echo "GOOGLE_BETA_REPO_PATH=${{ env.OUTPUT_PATH}}" >> $GITHUB_ENV
       - name: Checkout Repository
         if: steps.generate.outcome == 'success'
         uses: actions/checkout@v4
       - name: Check that new services have been added to the TeamCity configuration code
         if: steps.generate.outcome == 'success'
         run: |
           # Create lists of service packages in providers
-          ls ${GOOGLE_REPO_PATH}/google/services > tools/teamcity-diff-check/services_ga.txt
-          ls ${GOOGLE_BETA_REPO_PATH}/google-beta/services > tools/teamcity-diff-check/services_beta.txt
+          ls ${{env.GOOGLE_REPO_PATH}}/google/services > tools/teamcity-diff-check/services_ga.txt
+          ls ${{env.GOOGLE_BETA_REPO_PATH}}/google-beta/services > tools/teamcity-diff-check/services_beta.txt
 
           # Run tool to compare service packages in the providers vs those listed in TeamCity config files
           cd tools/teamcity-diff-check