Merge pull request swiftlang#83679 from lorentey/fix-arm64-abi-list

[test][abi] Fix unusual off-by-one backreference issue in arm64 ABI list

Author: lorentey

test/abi/macOS/arm64/stdlib.swift

@@ -1131,7 +1131,7 @@ Added: _$ss7UnicodeO15_WordRecognizerVADycfC
 Added: _$ss7UnicodeO15_WordRecognizerVMa
 Added: _$ss7UnicodeO15_WordRecognizerVMn
 Added: _$ss7UnicodeO15_WordRecognizerVN
-Added: _$ss7UnicodeO27_RandomAccessWordRecognizerV18hasGuaranteedBreak5afterSb12setCandidate_Sb07breakAtJ0Sb0K4HeretAB6ScalarV_tF
+Added: _$ss7UnicodeO27_RandomAccessWordRecognizerV18hasGuaranteedBreak5afterSb12setCandidate_Sb07breakAtK0Sb0L4HeretAB6ScalarV_tF
 Added: _$ss7UnicodeO27_RandomAccessWordRecognizerV6beforeAdB6ScalarV_tcfC
 Added: _$ss7UnicodeO27_RandomAccessWordRecognizerVMa
 Added: _$ss7UnicodeO27_RandomAccessWordRecognizerVMn