testers.testMetaPkgConfig: fix warning

[ajs124]

Description of changes

follow-up to feabc3d / #247920

before:

$ nix-instantiate -A curl.passthru.tests
/nix/store/69hkq0f92kvhmaa2snhs8sngxq848ypj-coeurl-0.3.0.drv
/nix/store/6vrl59bswmggpgvvk2wj99g6jxh123lk-curlpp-0.8.1.drv
/nix/store/fvbvg8yj2m0wvjdbijsfg395d2rk2hfn-source-salted-1dgvmnzzhxfq.drv
/nix/store/balx26mkxhjri9rdz22yycnhvjni6c2v-curl-1.3.8.drv
/nix/store/lj9q8bv3py8mnzv6139735lfvl781370-vm-test-run-nginx-http3.drv
/nix/store/pdl6ybssy397r488r2pky3y2kbzhr8yn-ocaml4.14.1-curly-0.2.0.drv
/nix/store/ljxh8wyyaw9zn807dqwqsb5cl8zcchnr-php-curl-8.2.10.drv
trace: warning: testers.hasPkgConfigModule has been deprecated in favor of testers.hasPkgConfigModules. It accepts a list of strings via the moduleNames argument instead of a single moduleName.
/nix/store/0svvl3vnfa844xnk0v4yfs5mgklcm9sw-check-meta-pkg-config-modules-for-curl-8.2.1.drv
/nix/store/w10x055i8jcw7s0n13dp3msj6rzmx0n5-python3.10-pycurl-7.45.1.drv
/nix/store/h5p2zwbj8h51clfyj5bbydrw6cy1d9ih-curl-8.2.1.drv!bin

after:

$ nix-instantiate -A curl.passthru.tests
/nix/store/69hkq0f92kvhmaa2snhs8sngxq848ypj-coeurl-0.3.0.drv
/nix/store/6vrl59bswmggpgvvk2wj99g6jxh123lk-curlpp-0.8.1.drv
/nix/store/fvbvg8yj2m0wvjdbijsfg395d2rk2hfn-source-salted-1dgvmnzzhxfq.drv
/nix/store/balx26mkxhjri9rdz22yycnhvjni6c2v-curl-1.3.8.drv
/nix/store/lj9q8bv3py8mnzv6139735lfvl781370-vm-test-run-nginx-http3.drv
/nix/store/pdl6ybssy397r488r2pky3y2kbzhr8yn-ocaml4.14.1-curly-0.2.0.drv
/nix/store/ljxh8wyyaw9zn807dqwqsb5cl8zcchnr-php-curl-8.2.10.drv
/nix/store/0svvl3vnfa844xnk0v4yfs5mgklcm9sw-check-meta-pkg-config-modules-for-curl-8.2.1.drv
/nix/store/w10x055i8jcw7s0n13dp3msj6rzmx0n5-python3.10-pycurl-7.45.1.drv
/nix/store/h5p2zwbj8h51clfyj5bbydrw6cy1d9ih-curl-8.2.1.drv!bin

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.