Update ci-linux.yml (#16)

Author: ctreffs

.github/workflows/ci-linux.yml

@@ -27,11 +27,11 @@ jobs:
       - name: Restore cached SPM dependencies
         uses: actions/cache@v3
         with:
-          path: |
-            .build/repositories
-          key: ${{ runner.os }}-spm-repos-${{ hashFiles('**/Package.resolved') }}
+          path: .build
+          key: swiftpm-${{ runner.os }}-${{ inputs.swift-version }}-${{ hashFiles('Package.swift') }}
           restore-keys: |
-            ${{ runner.os }}-spm-repos-
+            swiftpm-${{ runner.os }}-${{ inputs.swift-version }}-
+            swiftpm-${{ runner.os }}-
 
       - name: Install dependencies
         run: |