supressing rm error on no poetry.lock

.github/workflows/build-docs.yml

@@ -53,7 +53,7 @@ jobs:
           clean: false
       - name: Build Docs
         run: |
-          rm poetry.lock
+          rm -f poetry.lock
           poetry install --with docs
           poetry run sphinx-build doc_src docs/0.1.x
       - name: Checkout 0.2.x
@@ -63,7 +63,7 @@ jobs:
           clean: false
       - name: Build 0.2.x Docs
         run: |
-          rm poetry.lock
+          rm -f poetry.lock
           poetry install --with docs
           poetry run sphinx-build doc_src docs/0.2.x
       - name: Checkout 0.3.x
@@ -73,7 +73,7 @@ jobs:
           clean: false
       - name: Build Docs 0.3.x
         run: |
-          rm poetry.lock
+          rm -f poetry.lock
           poetry install --with docs
           poetry run mkdocs build -f=doc_src/mkdocs.yml -d=docs/0.3.x
       - name: Setup Pages