Bump ruby/setup-ruby from 1.287.0 to 1.288.0 (#457)

Author: PikachuEXE

.github/workflows/tests.yaml

@@ -82,7 +82,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: Setup Ruby
-        uses: ruby/setup-ruby@8d27f39a5e7ad39aebbcbd1324f7af020229645c # v1.287.0
+        uses: ruby/setup-ruby@09a7688d3b55cf0e976497ff046b70949eeaccfd # v1.288.0
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true