github: Use bash to interpret ~

Author: bkeryan

.github/workflows/check_docs.yml

@@ -31,6 +31,7 @@ jobs:
           key: pipx-${{ runner.os }}-py${{ steps.setup-python.outputs.python-version }}-poetry${{ env.POETRY_VERSION }}
       - name: Add PIPX_BIN_DIR to the path
         run: echo "${{ env.PIPX_BIN_DIR }}" >> "$GITHUB_PATH"
+        shell: bash
       - name: Set up Poetry
         run: pipx install poetry==${{ env.POETRY_VERSION }} --python '${{ steps.setup-python.outputs.python-path }}'
       - name: Check for lock changes

.github/workflows/check_nitypes.yml

@@ -31,6 +31,7 @@ jobs:
           key: pipx-${{ runner.os }}-py${{ steps.setup-python.outputs.python-version }}-poetry${{ env.POETRY_VERSION }}
       - name: Add PIPX_BIN_DIR to the path
         run: echo "${{ env.PIPX_BIN_DIR }}" >> "$GITHUB_PATH"
+        shell: bash
       - name: Set up Poetry
         run: pipx install poetry==${{ env.POETRY_VERSION }} --python '${{ steps.setup-python.outputs.python-path }}'
       - name: Check for lock changes

.github/workflows/run_unit_tests.yml

@@ -37,6 +37,7 @@ jobs:
           key: pipx-${{ runner.os }}-py${{ steps.setup-python.outputs.python-version }}-poetry${{ env.POETRY_VERSION }}
       - name: Add PIPX_BIN_DIR to the path
         run: echo "${{ env.PIPX_BIN_DIR }}" >> "$GITHUB_PATH"
+        shell: bash
       - name: Set up Poetry
         run: pipx install poetry==${{ env.POETRY_VERSION }} --python '${{ steps.setup-python.outputs.python-path }}'
       - name: Cache virtualenv