Disable 5.8, 5.9, and 5.10 checks

Author: aryan-25

.github/workflows/pull_request.yml

@@ -16,9 +16,9 @@ jobs:
         name: Unit tests
         uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
         with:
-            linux_5_8_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
-            linux_5_9_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
-            linux_5_10_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
+            linux_5_8_enabled: false
+            linux_5_9_enabled: false
+            linux_5_10_enabled: false
             linux_nightly_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"
             linux_nightly_main_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error"