Typo in compilation docs (#1588)

* Typo in compilation docs

* [Fix] Deprecated leptonica name

With version 1.84.0, the library is changed from `liblept` to
`libleptonica`.
http://www.leptonica.org/source/version-notes.html

docs/COMPILATION.MD

@@ -57,7 +57,7 @@ cd ccextractor/linux
 ./build -without-rust
 
 # compile with debug info
-./build -debug            # same as ./build_debug
+./build -debug            # same as ./builddebug
 
 # compile with hardsubx
 [Optional] You need to set these environment variables correctly according to your machine,

linux/build

@@ -85,7 +85,7 @@ SRC_FREETYPE="../src/thirdparty/freetype/autofit/autofit.c
         ../src/thirdparty/freetype/type42/type42.c
         ../src/thirdparty/freetype/winfonts/winfnt.c"
 BLD_SOURCES="../src/ccextractor.c $SRC_CCX $SRC_GPAC $SRC_ZLIB $SRC_LIBPNG $SRC_HASH $SRC_PROTOBUF $SRC_UTF8PROC $SRC_FREETYPE"
-BLD_LINKER="$BLD_LINKER -lm -zmuldefs -l tesseract -l lept -lpthread -ldl -lgpac"
+BLD_LINKER="$BLD_LINKER -lm -zmuldefs -l tesseract -l leptonica -lpthread -ldl -lgpac"
 
 echo "Running pre-build script..."
 ./pre-build.sh