[SITES-22335] js parse error fix 2

[YahorC]

The ?. operator was included in ES2020, which is supported by Node 14 (released in April 2020). But we are currently using ES2015 (see content.xml)

Q	A
Fixed Issues?	SITES-22335
Patch: Bug Fix?
Minor: New Feature?
Major: Breaking Change?
Tests Added + Pass?	Yes
Documentation Provided	Yes (code comments and or markdown)
Any Dependency Changes?
License	Apache License, Version 2.0

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 87.21%. Comparing base (681d1bf) to head (21b0844).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2828 +/- ## ========================================= Coverage 87.21% 87.21% Complexity 2690 2690 ========================================= Files 235 235 Lines 7173 7173 Branches 1096 1096 ========================================= Hits 6256 6256 Misses 363 363 Partials 554 554 ```

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