Update ruby/setup-ruby action to v1.288.0 (#1981)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pr-build.yml

@@ -24,7 +24,7 @@ jobs:
           node-version: 24.13.0
 
       - name: Set up Ruby 3.2
-        uses: ruby/setup-ruby@8d27f39a5e7ad39aebbcbd1324f7af020229645c # v1.287.0
+        uses: ruby/setup-ruby@09a7688d3b55cf0e976497ff046b70949eeaccfd # v1.288.0
         with:
           ruby-version: 3.4.8
 

.github/workflows/site-build.yml

@@ -24,7 +24,7 @@ jobs:
           node-version: 24.13.0
 
       - name: Set up Ruby 3.2
-        uses: ruby/setup-ruby@8d27f39a5e7ad39aebbcbd1324f7af020229645c # v1.287.0
+        uses: ruby/setup-ruby@09a7688d3b55cf0e976497ff046b70949eeaccfd # v1.288.0
         with:
           ruby-version: 3.4.8