fix main.yml quotes (#16)

fix main.yml quotes

Author: rnro

.github/workflows/main.yml

@@ -12,7 +12,7 @@ jobs:
     uses: apple/swift-nio/.github/workflows/unit_tests.yml@main
     with:
       linux_5_9_arguments_override: "--explicit-target-dependency-import-check error"
-      linux_5_10_arguments_override: --explicit-target-dependency-import-check error"
+      linux_5_10_arguments_override: "--explicit-target-dependency-import-check error"
       linux_6_0_arguments_override: "-Xswiftc -warnings-as-errors --explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
       linux_nightly_6_0_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"
       linux_nightly_main_arguments_override: "--explicit-target-dependency-import-check error -Xswiftc -require-explicit-sendable"