Make jq command to collect benchmarks more readable

Co-authored-by: Aaron Abbott <[email protected]>

.github/workflows/test.yml

@@ -64,7 +64,10 @@ jobs:
       - name: Find and merge benchmarks
         # TODO: Add at least one benchmark to every package type to remove this
         if: matrix.package == 'core'
-        run: jq -s '.[0].benchmarks = ([.[].benchmarks] | add) | if .[0].benchmarks == null then null else .[0] end' opentelemetry-*/tests/*${{ matrix.package }}*.json > output.json
+        run: >-
+          jq -s '.[0].benchmarks = ([.[].benchmarks] | add)
+          | if .[0].benchmarks == null then null else .[0] end'
+          opentelemetry-*/tests/*${{ matrix.package }}*.json > output.json
       - name: Report on benchmark results
         # TODO: Add at least one benchmark to every package type to remove this
         if: matrix.package == 'core'