fix: is_merge should be False by default

[cristianmtr]

As agreed, is_merge should be False by default. See #1705 (comment)

[codecov]

Codecov Report

Merging #1855 (72af5d2) into master (4dbf094) will increase coverage by 0.06%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #1855      +/-   ##
==========================================
+ Coverage   85.92%   85.99%   +0.06%     
==========================================
  Files         146      146              
  Lines        6983     6982       -1     
==========================================
+ Hits         6000     6004       +4     
+ Misses        983      978       -5     

Impacted Files	Coverage Δ
jina/peapods/runtimes/asyncio/rest/app.py	77.55% <0.00%> (ø)
jina/proto/jina_pb2.py	100.00% <ø> (ø)
jina/drivers/querylang/reverse.py	100.00% <100.00%> (ø)
jina/drivers/querylang/select.py	89.65% <100.00%> (ø)
jina/drivers/querylang/sort.py	100.00% <100.00%> (ø)
jina/drivers/search.py	96.49% <100.00%> (ø)
jina/peapods/runtimes/jinad/client.py	78.67% <0.00%> (+3.67%)	⬆️

---

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[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1189, delta to last 3 avg.: +0%
• 😶 query QPS at 23, delta to last 3 avg.: -2%

Breakdown

Version	Index QPS	Query QPS
current	1189	23
0.9.28	1189	24
0.9.27	1199	23

Backed by latency-tracking. Further commits will update this comment.

[JoanFM]

make sure u change the parameter for the helloworld example, since this broke it

[cristianmtr]

make sure u change the parameter for the helloworld example, since this broke it

Ran it locally with the newest changes, and it works

tested

[cristianmtr]