otlptranslator/update-copy.sh: Fix sed command lines

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

storage/remote/otlptranslator/update-copy.sh

@@ -18,5 +18,5 @@ rm -rf ./prometheus/*_test.go
 
 rm -rf ./tmp
 
-sed -i '' 's#github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus#github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus#g' ./prometheusremotewrite/*.go
-sed -i '' '1s#^#// DO NOT EDIT. COPIED AS-IS. SEE ../README.md\n\n#g' ./prometheusremotewrite/*.go ./prometheus/*.go
+sed -i 's#github.com/open-telemetry/opentelemetry-collector-contrib/pkg/translator/prometheus#github.com/prometheus/prometheus/storage/remote/otlptranslator/prometheus#g' ./prometheusremotewrite/*.go
+sed -i '1s#^#// DO NOT EDIT. COPIED AS-IS. SEE ../README.md\n\n#g' ./prometheusremotewrite/*.go ./prometheus/*.go