update name of OAuth client secrets in test.yml to match those in this repo

Updates tailscale/corp#32821

Signed-off-by: Percy Wegmann <percy@tailscale.com>

Author: oxtoacart

.github/workflows/test.yml

@@ -95,8 +95,8 @@ jobs:
         id: tailscale-oauth
         uses: ./
         with:
-          oauth-client-id: ${{ secrets.TS_AUTH_KEYS_OAUTH_CLIENT_ID }}
-          oauth-secret: ${{ secrets.TS_AUTH_KEYS_OAUTH_CLIENT_SECRET }}
+          oauth-client-id: ${{ secrets.TS_OAUTH_CLIENT_ID }}
+          oauth-secret: ${{ secrets.TS_OAUTH_SECRET }}
           tags: "tag:ci"
           version: "${{ matrix.version }}"
           use-cache: false