Ensure prettyPrintFileSystemType() returns correct spelling for LittleFS

[aliphys]

Corrects spelling of LittleFS in the prettyPrintFileSystemType() method
Closes #43

[github-actions]

Memory usage change @ cb307ba

Board	flash	%	RAM for global variables	%
arduino:mbed_opta:opta	💚 -16 - -8	-0.0 - -0.0	0 - 0	0.0 - 0.0
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A
arduino:renesas_portenta:portenta_c33	💚 -8 - -8	-0.0 - -0.0	0 - 0	0.0 - 0.0

Click for full report table

Board	extras/tests/TestExisting flash	%	extras/tests/TestExisting RAM for global variables	%	extras/tests/TestFileOperations flash	%	extras/tests/TestFileOperations RAM for global variables	%	extras/tests/TestFolderOperations flash	%	extras/tests/TestFolderOperations RAM for global variables	%	extras/tests/TestRepeatedFormatMount flash	%	extras/tests/TestRepeatedFormatMount RAM for global variables	%	examples/SimpleStorageWriteRead flash	%	examples/SimpleStorageWriteRead RAM for global variables	%	examples/AdvancedUSBInternalOperations flash	%	examples/AdvancedUSBInternalOperations RAM for global variables	%	examples/BackupInternalPartitions flash	%	examples/BackupInternalPartitions RAM for global variables	%
arduino:mbed_opta:opta	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-16	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0
arduino:mbed_portenta:envie_m7	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A	N/A
arduino:renesas_portenta:portenta_c33	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0	-8	-0.0	0	0.0

Click for full report CSV

Board,extras/tests/TestExisting<br>flash,%,extras/tests/TestExisting<br>RAM for global variables,%,extras/tests/TestFileOperations<br>flash,%,extras/tests/TestFileOperations<br>RAM for global variables,%,extras/tests/TestFolderOperations<br>flash,%,extras/tests/TestFolderOperations<br>RAM for global variables,%,extras/tests/TestRepeatedFormatMount<br>flash,%,extras/tests/TestRepeatedFormatMount<br>RAM for global variables,%,examples/SimpleStorageWriteRead<br>flash,%,examples/SimpleStorageWriteRead<br>RAM for global variables,%,examples/AdvancedUSBInternalOperations<br>flash,%,examples/AdvancedUSBInternalOperations<br>RAM for global variables,%,examples/BackupInternalPartitions<br>flash,%,examples/BackupInternalPartitions<br>RAM for global variables,%
arduino:mbed_opta:opta,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-16,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A
arduino:renesas_portenta:portenta_c33,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0,-8,-0.0,0,0.0