Fix environment variables

Author: DavidCEllis

.github/workflows/build_zipapp.yml

@@ -56,10 +56,11 @@ jobs:
     - name: Upload artifact signature to GitHub Release
       env:
         GITHUB_TOKEN: ${{ github.token }}
+      shell: bash
       # Upload to GitHub Release using the `gh` CLI.
       # `dist/` contains the built packages, and the
       # sigstore-produced signatures and certificates.
       run: >-
         gh release upload
-        '${{ github.ref_name }}' dist/**
-        --repo '${{ github.repository }}'
+        "${GITHUB_REF_NAME}" dist/**
+        --repo "${GITHUB_REPOSITORY}"

.github/workflows/publish_to_pypi.yml

@@ -82,10 +82,11 @@ jobs:
     - name: Upload artifact signatures to GitHub Release
       env:
         GITHUB_TOKEN: ${{ github.token }}
+      shell: bash
       # Upload to GitHub Release using the `gh` CLI.
       # `dist/` contains the built packages, and the
       # sigstore-produced signatures and certificates.
       run: >-
         gh release upload
-        '${{ github.ref_name }}' dist/**
-        --repo '${{ github.repository }}'
+        "${GITHUB_REF_NAME}" dist/**
+        --repo "${GITHUB_REPOSITORY}"