Update dependency @types/underscore to v1.11.15

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@types/underscore (source)	1.11.6 -> 1.11.15

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[github-actions]

Benchmark result: base (main)

ruby 3.2.3 (2024-01-18 revision 52bb2ac0a6) [x86_64-linux]
Warming up --------------------------------------
                      69.000 i/100ms
Calculating -------------------------------------
                      697.172 (± 1.1%) i/s -     20.976k in  30.091884s

[github-actions]

Benchmark result: head (renovate/underscore-1.x-lockfile)

ruby 3.2.3 (2024-01-18 revision 52bb2ac0a6) [x86_64-linux]
Warming up --------------------------------------
                      68.000 i/100ms
Calculating -------------------------------------
                      684.893 (± 1.8%) i/s -     20.604k in  30.094404s