Update dependency skylight to v7.1.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
skylight (source)	7.0.0 → 7.1.1

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Release Notes

skylightio/skylight-ruby (skylight)

v7.1.1

Compare Source

• BUGFIX Fix native extension build on GCC 15 by using append_cflags instead of mutating $CFLAGS directly.
• BUGFIX Replace K&R-style empty parameter lists (()) with (void) in C sources to build cleanly under Fedora's -Werror=old-style-definition.

v7.1.0

Compare Source

• BREAKING end support for Rails < 7.2.
• IMPROVEMENT better support for Grape 3.x
• IMPROVEMENT better ActiveRecord instrumentation for async queries in Rails 8.2

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Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
Overall Coverage	🟢 53.11%	🟢 53.11%	⚪ 0%

Minimum allowed coverage is 0%, this run produced 53.11%