chore(gnokey): add newline when showing data from query

[leohhhn]

Description

This PR adds a newline to make the data display of queries a bit nicer.

Before:

> gnokey query vm/qfile -data "gno.land/r/demo/wugnot" -remote https://rpc.gno.land:443
height: 0
data: wugnot.gno
z0_filetest.gno

After:

> gnokey query vm/qfile -data "gno.land/r/demo/wugnot" -remote https://rpc.gno.land:443
height: 0
data:
wugnot.gno
z0_filetest.gno

Similar case for other queries.

Contributors' checklist...

• Added new tests, or not needed, or not feasible
• Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• Updated the official documentation or not needed
• No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• Added references to related issues and PRs
• Provided any useful hints for running manual tests
• Added new benchmarks to generated graphs, if any. More info here.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 60.52%. Comparing base (2873354) to head (0742803).

Files with missing lines	Patch %	Lines
tm2/pkg/crypto/keys/client/query.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2774      +/-   ##
==========================================
- Coverage   63.32%   60.52%   -2.81%     
==========================================
  Files         548      567      +19     
  Lines       78511    76810    -1701     
==========================================
- Hits        49715    46486    -3229     
- Misses      25443    26918    +1475     
- Partials     3353     3406      +53     

Flag	Coverage Δ
contribs/gnodev	60.57% <ø> (+0.62%)	⬆️
contribs/gnofaucet	14.82% <ø> (ø)
misc/genstd	79.72% <ø> (ø)
tm2	62.39% <0.00%> (-0.04%)	⬇️

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[jefft0]

Hi @leohhhn . Do you want to merge master to see if it fixes some of the failing CI tests?

[jefft0]

@leohhhn , can you fix the failed CI test for "Go Test / test"? It's failing because your commit changes the expected output for "data:". For example:

            FAIL: testdata/event_multi_msg.txtar:10: no match for `data: {` found in stdout