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fix formatting of final gh-cache output line

+1 -1
+1 -1
system/gh-cache.bash
··· 106 106 jq . "$output_file" 107 107 total_mb="$(jq 'map(.total_size_mb) | add' $output_file)" 108 108 109 - echo "Overall total: $(total_mb)MB" 109 + echo "Overall total: $total_mb MB"