actions: remove all template injection

Author: oscarbenjamin

.github/workflows/buildwheel.yml

@@ -101,7 +101,7 @@ jobs:
         # This is probably something to do with \ vs / in paths...
       - if: ${{ startsWith( matrix.os , 'windows' ) }}
         run: |
-          $pkgConfigPath = "${{ github.workspace }}/.local/lib/pkgconfig"
+          $pkgConfigPath = "$env:GITHUB_WORKSPACE/.local/lib/pkgconfig"
           $pkgConfigPath = $pkgConfigPath.Replace('\', '/')
           echo "PKG_CONFIG_PATH=$pkgConfigPath" >> $env:GITHUB_ENV
 
@@ -225,7 +225,7 @@ jobs:
           node-version: '22'
 
       - run: pip install pyodide-build
-      - run: pyodide xbuildenv install "${{ env.PYODIDE_VERSION }}"
+      - run: pyodide xbuildenv install "$PYODIDE_VERSION"
 
       - uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
         with:
@@ -315,7 +315,9 @@ jobs:
       - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: '3.13'
-      - run: bin/install_flint_ubuntu.sh ${{ matrix.flint-tag }}
+      - env:
+          FLINT_TAG: ${{ matrix.flint-tag }}
+        run: bin/install_flint_ubuntu.sh "$FLINT_TAG"
       - run: pip install .
       - run: python -m flint.test --verbose
 
@@ -402,7 +404,9 @@ jobs:
       - run: sudo apt-get install libflint-dev
       - run: pip install .
       - run: pip install pytest pytest-xdist hypothesis
-      - run: pip install sympy==${{ matrix.sympy-version }}
+      - env:
+          SYMPY_VERSION: ${{ matrix.sympy-version }}
+        run: pip install "sympy==$SYMPY_VERSION"
       - run: python -c 'import sympy; sympy.test(parallel=True)'
 
   # Run SymPy master branch agains python-flint main