Remove target from cache to fix stale docs builds

Author: d-oit

.github/workflows/docs.yml

@@ -29,7 +29,6 @@ jobs:
         path: |
           ~/.cargo/registry
           ~/.cargo/git
-          target
         key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
 
     - name: Build Documentation