Bump deps/GSL from `caae4dd` to `7fabaa4`

[dependabot[bot]]

Bumps deps/GSL from caae4dd to 7fabaa4.

Commits

• 7fabaa4 deprecate features adopted into C++ (#1198)
• 4742bc1 use relative path in # include (#1194)
• ec729d6 introduce gsl::not_null<T>::element_type (#1196)
• 7f4fc93 Add more gsl::span tests [copilot] (#1189)
• 355982d Delete gsl/string_span (#1185)
• 50aaf2e remove documentation for deprecated make_span overloads (#1183)
• 7b6b801 Add "gsl" to #includes (#1184)
• 1cdb8d2 More checks for non-compilable code, plus fix for span (#1180)
• c832885 React to ubuntu-latest changing to 24.04 (#1181)
• 16a6019 strict_not_null for unique_ptr (#1179)
• Additional commits viewable in compare view

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