Install/run codespell "manually"

Action does not yet allow for --config option to be
passed
  codespell-project/actions-codespell#67

.github/workflows/codespell.yml

@@ -9,11 +9,19 @@ on:
 
 jobs:
   codespell:
-    name: Check for spelling errors
+    name: Check for typos
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout
         uses: actions/checkout@v3
-      - name: Codespell
-        uses: codespell-project/actions-codespell@v2
+      # codespell github action does not yet allow for --config option
+      # https://github.com/codespell-project/actions-codespell/issues/67
+      # so we need to install and invoke "manually"
+      - name: Set up Python
+        uses: actions/setup-python@v4
+      - name: Install codespell
+        run: |
+            python -m pip install codespell
+      - name: Run codespell
+        run: codespell --config src/tools/codespellrc