CI: simplify artifact upload

Author: fridtjof

.github/workflows/main.yml

@@ -33,23 +33,19 @@ jobs:
         id: toolchain-cache
         with:
           path: |
-            toolchain.tar.gz
             ndless-sdk/toolchain/install
           # gcc/binutils/etc versions are in build_toolchain.sh, so that'll be part of our cache key
           key: ${{ matrix.os }}-${{ hashFiles('ndless-sdk/toolchain/build_toolchain.sh') }}
       - name: Build toolchain
         if: steps.toolchain-cache.outputs.cache-hit != 'true'
         working-directory: ndless-sdk/toolchain
         run: ./build_toolchain.sh
-      - name: Package toolchain
-        if: steps.toolchain-cache.outputs.cache-hit != 'true'
-        run: tar -cvzf toolchain.tar.gz ndless-sdk/toolchain/install
 
       - name: Upload built toolchain
         uses: actions/upload-artifact@v2
         with:
           name: toolchain-${{ matrix.os }}
-          path: toolchain.tar.gz
+          path: ndless-sdk/toolchain/install
 
       # actual build starts here
       - name: Set up PATH