fix: Error in `node update` separate commands when new admin key is not supplied

[Ivo-Yankov]

Fixes a parsing error in solo node update-submit-transactions and solo node update-execute that prevented the commands from executing. It was occurring when no --new-admin-key was specified.

[github-actions[bot]]

Unit Test Results - Linux

  1 files   35 suites   3s ⏱️  95 tests  95 ✅ 0 💤 0 ❌ 104 runs  104 ✅ 0 💤 0 ❌

Results for commit 2e1a83c9.

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Unit Test Results - Windows

  1 files   35 suites   12s ⏱️  95 tests  95 ✅ 0 💤 0 ❌ 104 runs  104 ✅ 0 💤 0 ❌

Results for commit 2e1a83c9.

[github-actions[bot]]

E2E Test Report

 16 files  109 suites   1h 2m 58s ⏱️ 226 tests 226 ✅ 0 💤 0 ❌ 229 runs  229 ✅ 0 💤 0 ❌

Results for commit 2e1a83c9.

[github-actions[bot]]

E2E Test Report

 16 files  109 suites   1h 2m 58s ⏱️ 226 tests 226 ✅ 0 💤 0 ❌ 229 runs  229 ✅ 0 💤 0 ❌

Results for commit 2e1a83c9.

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Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
Report missing for 9a5c920f5b29d3763c6203d9f0aeef56038439c4[^1]	:white_check_mark: 100.00%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (9a5c920f5b29d3763c6203d9f0aeef56038439c4) | Report Missing | Report Missing | Report Missing | | | Head commit (2e1a83c9bbe0dab2dec6597724a967e87dbe2b39) | 13589 | 11871 | 87.36% | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#854) | 8 | 8 | **100.00%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more} [^1]: Codacy didn't receive coverage data for the commit, or there was an error processing the received data. Check your integration for errors and validate that your coverage setup is correct.