Lock doctoc version

.circleci/config.yml

@@ -176,7 +176,7 @@ jobs:
       - checkout
       - run:
           name: Check table of contents
-          command: sudo npm install -g doctoc@2 && make check_toc
+          command: sudo npm install -g doctoc@2.2.0 && make check_toc
   codespell:
     docker:
       - image: circleci/python:3.9

.github/workflows/run-tests.yml

@@ -50,7 +50,7 @@ jobs:
         with:
           ref: ${{ github.event.inputs.commitRef || env.DEFAULT_BRANCH }}
       - name: Check table of contents
-        run: sudo npm install -g doctoc@2 && make check_toc
+        run: sudo npm install -g doctoc@2.2.0 && make check_toc
 
   codespell:
    runs-on: self-hosted