refactor: move filter to folder with use site

Author: alexeagle

filter.jq renamed to .github/workflows/filter.jq

@@ -53,7 +53,7 @@ jobs:
           If it's your initial install, use the following \`tools.lock.json\`:
 
           \`\`\`json
-          $(jq --arg tag "${{ needs.tag.outputs.tag }}" -Rs -f filter.jq assets/CHECKSUMS)
+          $(jq --arg tag "${{ needs.tag.outputs.tag }}" -Rs -f .github/workflows/filter.jq assets/CHECKSUMS)
           \`\`\`
           EOF
       - name: Generate artifact attestation