fix: use architecture as part of cache key (#36)

Use architecture as part of the cache key to avoid bad cache hits. The
current implementation can crash pipelines using matrix strategies or
when different pipelines use different architectures but leverage the
Devbox action.

Fixes: #35

---------

Signed-off-by: Pedro Morello Abbud <abbudao@gmail.com>
Co-authored-by: Lucille Hua <lucille.hua@jetpack.io>

action.yml

@@ -56,7 +56,7 @@ runs:
       uses: actions/cache/restore@v4
       with:
         path: /usr/local/bin/devbox
-        key: ${{ runner.os }}-devbox-cli-${{ env.latest_version }}
+        key: ${{ runner.os }}-${{ runner.arch }}-devbox-cli-${{ env.latest_version }}
 
     - name: Install devbox cli
       if: steps.cache-devbox-cli.outputs.cache-hit != 'true'
@@ -99,7 +99,7 @@ runs:
       uses: actions/cache/save@v4
       with:
         path: /usr/local/bin/devbox
-        key: ${{ runner.os }}-devbox-cli-${{ env.latest_version }}
+        key: ${{ runner.os }}-${{ runner.arch }}-devbox-cli-${{ env.latest_version }}
 
     - name: Workaround nix store cache permission issue
       if: inputs.enable-cache == 'true'
@@ -145,7 +145,7 @@ runs:
           ~/.nix-profile
           /nix/store
           /nix/var/nix
-        key: ${{ runner.os }}-devbox-nix-store-${{ hashFiles(format('{0}/devbox.lock', inputs.project-path)) }}
+        key: ${{ runner.os }}-${{ runner.arch }}-devbox-nix-store-${{ hashFiles(format('{0}/devbox.lock', inputs.project-path)) }}
 
     - name: Install devbox packages
       shell: bash
@@ -164,7 +164,7 @@ runs:
           ~/.nix-profile
           /nix/store
           /nix/var/nix
-        key: ${{ runner.os }}-devbox-nix-store-${{ hashFiles(format('{0}/devbox.lock', inputs.project-path)) }}
+        key: ${{ runner.os }}-${{ runner.arch }}-devbox-nix-store-${{ hashFiles(format('{0}/devbox.lock', inputs.project-path)) }}
 
     - name: Restore tar command
       if: inputs.enable-cache == 'true'