Fix spelling workflow conditions

Author: msimberg

.github/workflows/spelling.yaml

@@ -33,8 +33,8 @@ jobs:
         suppress_push_for_open_pull_request: ${{ github.actor != 'dependabot[bot]' && 1 }}
         checkout: true
         check_file_names: 0
-        only_check_changed_files: {{ github.event.pull_request && 1 }}
-        post_comment: {{ github.event.pull_request && 1 }}
+        only_check_changed_files: ${{ github.event.pull_request && 1 }}
+        post_comment: ${{ github.event.pull_request && 1 }}
         use_magic_file: 1
         warnings: bad-regex,binary-file,deprecated-feature,large-file,limited-references,no-newline-at-eof,noisy-file,token-is-substring,unexpected-line-ending,whitespace-in-dictionary,minified-file,unsupported-configuration,no-files-to-check
         use_sarif: ${{ (!github.event.pull_request || (github.event.pull_request.head.repo.full_name == github.repository)) && 1 }}