Merge #3150

3150: Fix Clippy CI job cache to really include the platform. r=messense a=adamreichold

Doesn't really matter since we never build the same target on different platforms, but fixing it will prevent future confusion when reading it. Sorry for the extra lap. 😫

Co-authored-by: Adam Reichold <adam.reichold@t-online.de>

.github/workflows/ci.yml

@@ -103,7 +103,7 @@ jobs:
           architecture: ${{ matrix.platform.python-architecture }}
       - uses: Swatinem/rust-cache@v2
         with:
-          key: clippy-${{ matrix.platform.rust-target }}-${{ matrix.os }}-${{ matrix.rust }}
+          key: clippy-${{ matrix.platform.rust-target }}-${{ matrix.platform.os }}-${{ matrix.rust }}
         continue-on-error: true
       - run: python -m pip install --upgrade pip && pip install nox
       - if: matrix.msrv == 'MSRV'