HMI API description typos

[theresalech]

Bug Report

There are a few typos in descriptions within the HMI_API.xml, which are in the process of being fixed in the MOBILE_API.xml in the RPC Spec repo: https://github.com/smartdevicelink/rpc_spec/pull/278/files

Expected Behavior

• "Capabilities" should be spelled correctly within description for windowCapabilities param in DisplayCapability struct: https://github.com/smartdevicelink/sdl_core/blob/master/src/components/interfaces/HMI_API.xml#L3554:
• Include hyphen in "pre-populate" within description for autoCompleteList param in KeyboardProperties struct: https://github.com/smartdevicelink/sdl_core/blob/master/src/components/interfaces/HMI_API.xml#L3064
• "Positions" should be spelled correctly within description for SAVE in SeatMemoryActionType enum: https://github.com/smartdevicelink/sdl_core/blob/master/src/components/interfaces/HMI_API.xml#L1756
• "Sirius XM" should be capitalized within description for siriusxmRadioAvailable param: https://github.com/smartdevicelink/sdl_core/blob/master/src/components/interfaces/HMI_API.xml#L2101

Observed Behavior

• Description for windowCapabilities param in DisplayCapability struct currently includes "capabilties"
• Description for autoCompleteList param in KeyboardProperties struct currently includes "prepopulate"
• Description for SAVE in SeatMemoryActionType enum currently includes "postions"
• Description for siriusxmRadioAvailable param currently includes "sirius XM"

[theresalech]

Closed via #3505