SNOW-787480: fix json load encoding error

[sfc-gh-aling]

Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes SNOW-787480

next action item: add telemetry to collect encoding info: https://snowflakecomputing.atlassian.net/browse/SNOW-801885

2. Fill out the following pre-review checklist:

   • I am adding a new automated test(s) to verify correctness of my new code
   • I am adding new logging messages
   • I am adding a new telemetry message
   • I am modifying authorization mechanisms
   • I am adding new credentials
   • I am modifying OCSP code
   • I am adding a new dependency

3. Please describe how your code solves the related issue.

   Please write a short description of how your code change solves the related issue.

[codecov]

Codecov Report

Merging #1528 (98fea13) into main (e937591) will increase coverage by 0.11%.
The diff coverage is 95.65%.

❗ Current head 98fea13 differs from pull request most recent head fbc8861. Consider uploading reports for the commit fbc8861 to get more accurate results

@@            Coverage Diff             @@
##             main    #1528      +/-   ##
==========================================
+ Coverage   82.10%   82.22%   +0.11%     
==========================================
  Files          61       61              
  Lines        8622     8651      +29     
  Branches     1274     1281       +7     
==========================================
+ Hits         7079     7113      +34     
+ Misses       1207     1204       -3     
+ Partials      336      334       -2     

Impacted Files	Coverage Δ
src/snowflake/connector/connection.py	89.28% <ø> (ø)
src/snowflake/connector/options.py	92.45% <ø> (ø)
src/snowflake/connector/cursor.py	94.40% <84.61%> (-0.27%)	⬇️
src/snowflake/connector/auth/by_plugin.py	88.46% <100.00%> (+0.14%)	⬆️
src/snowflake/connector/file_transfer_agent.py	86.48% <100.00%> (+1.22%)	⬆️
src/snowflake/connector/network.py	82.78% <100.00%> (+0.14%)	⬆️
src/snowflake/connector/pandas_tools.py	84.11% <100.00%> (+0.45%)	⬆️
src/snowflake/connector/result_batch.py	91.95% <100.00%> (+0.23%)	⬆️
src/snowflake/connector/version.py	100.00% <100.00%> (ø)

... and 5 files with indirect coverage changes

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[sfc-gh-mkeller]

Just small nitpicks

🚢 🚢