ARROW-15: Fix a naming typo for memory.AllocationManager.AllocationOutcome#4

lw-lin wants to merge 1 commit intoapache:masterapache/arrow:masterfrom

lw-lin:ARROW-15--Fix-a-naming-typo-for-memory.AllocationManager.AllocationOutcomelw-lin/arrow:ARROW-15--Fix-a-naming-typo-for-memory.AllocationManager.AllocationOutcomeCopy head branch name to clipboard