fix: fixed networkNodeUrl and mirrorNode constant values

[quiet-node]

Description: Updates the networkNodeUrl and mirrorNode constant values. The SDK doesn't parse DNS url but IP addresses.

Related issue(s):

Fixes #651

Notes for reviewer:

Checklist

• [ ] Documented (Code comments, README, etc.)
• [ ] Tested (unit, integration, etc.)

[github-actions[bot]]

Test Results

242 tests  +17   236 :heavy_check_mark: +17   7m 23s :stopwatch: -4s   72 suites +  9       6 :zzz: ±  0    14 files   +  2       0 :x: ±  0 

Results for commit baf08d8f. ± Comparison against base commit ed677b74.

:recycle: This comment has been updated with latest results.