Rename ci to .ci

.github/workflows/tests.yml

@@ -142,7 +142,7 @@ jobs:
         uses: docker://ubuntu:bionic # For old python and sqlite
         with:
           workdir: /github/workspace
-          entrypoint: ci/scripts/test_old_deps.sh
+          entrypoint: .ci/scripts/test_old_deps.sh
         env:
           TRIAL_FLAGS: "--jobs=2"
       - name: Dump logs
@@ -229,7 +229,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Prepare test blacklist
-        run: cat sytest-blacklist ci/worker-blacklist > synapse-blacklist-with-workers
+        run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
       - name: Run SyTest
         run: /bootstrap.sh synapse
         working-directory: /src
@@ -278,7 +278,7 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
-      - run: ci/scripts/test_synapse_port_db.sh
+      - run: .ci/scripts/test_synapse_port_db.sh
 
   complement:
     if: ${{ !failure() && !cancelled() }}