fix(release-to-candidate): fix broken manifests when project_root i…

…s used

In cases where project root is used, the workflow changes directory, and then writes the manifest.

In subsequent steps, a manifest is written without changing directory, meaning there is incomplete information, resulting in broken tables as seen in this issue: snapcrafters/ffmpeg-2404-sdk#12

release-to-candidate/action.yaml

@@ -76,7 +76,10 @@ runs:
         # https://bugs.launchpad.net/snapcraft/+bug/1885150
         yq -i '.architectures |= [{"build-on": env(arch)}]' "$yaml_path"
 
+        manifest="${PWD}/manifest-${arch}.yaml"
+
         cd "$project_root" && git init || exit
+
         if ! snapcraft remote-build --launchpad-accept-public-upload; then
           cat "${name}_${arch}.txt"
         fi
@@ -93,8 +96,8 @@ runs:
         if  [[ -n "$project_root" ]]; then
             echo "snap=${project_root}/${name}_${version}_${arch}.snap" >> "$GITHUB_OUTPUT"
         fi
-        echo "name: ${name}" >> "manifest-${arch}.yaml"
-        echo "architecture: ${arch}" >> "manifest-${arch}.yaml"
+        echo "name: ${name}" >> "$manifest"
+        echo "architecture: ${arch}" >> "manifest"
 
     - name: Review the built snap
       uses: diddlesnaps/snapcraft-review-action@v1