Use latest rust

Author: santhoshtr

.github/workflows/python.yaml

@@ -42,6 +42,7 @@ jobs:
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
           manylinux: auto
           working-directory: bindings/python
+          rust-toolchain: stable
       - name: Install pytest
         run: pip install pytest
       - name: Install wheel for testing
@@ -76,6 +77,7 @@ jobs:
           args: --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
           working-directory: bindings/python
+          rust-toolchain: stable
       - name: Install pytest
         run: pip install pytest
       - name: Install wheel for testing
@@ -109,6 +111,7 @@ jobs:
           args: --release --out dist --find-interpreter
           sccache: ${{ !startsWith(github.ref, 'refs/tags/') }}
           working-directory: bindings/python
+          rust-toolchain: stable
       - name: Install pytest
         run: pip install pytest
       - name: Install wheel for testing