[NFC][Support] Replace "Return" with "Returns" in comments (#167395)

Fixes typos in comments in `SpecialCaseList.h`.

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Co-authored-by: Copilot <[email protected]>

Author: vitalybuka

llvm/include/llvm/Support/SpecialCaseList.h

@@ -203,13 +203,13 @@ class SpecialCaseList {
 
     Section(Section &&) = default;
 
-    // Return name of the section, its entire string in [].
+    // Returns name of the section, its entire string in [].
     StringRef name() const { return SectionStr; }
 
     // Returns true if string 'Name' matches section name interpreted as a glob.
     LLVM_ABI bool matchName(StringRef Name) const;
 
-    // Return sequence number of the file where this section is defined.
+    // Returns sequence number of the file where this section is defined.
     unsigned fileIndex() const { return FileIdx; }
 
     // Helper method to search by Prefix, Query, and Category. Returns