lmdk: Fix typo in README.md

Fixes typo in README.md.

Signed-off-by: Serhiy Katsyuba <serhiy.katsyuba@intel.com>

Author: serhiy-katsyuba-intel

lmdk/README.md

@@ -5,7 +5,7 @@
 To build dummy loadable library execute:
 
     cd libraries/dummy
-    cmake -B build -G <Ninja/Makefile> -DRIMAGE_INSTALL_DIR="path/where/rimage/executable/is" -DSNIGNING_KEY="path/to/key"
+    cmake -B build -G <Ninja/Makefile> -DRIMAGE_INSTALL_DIR="path/where/rimage/executable/is" -DSIGNING_KEY="path/to/key"
     cd --build build
 
 
@@ -14,4 +14,4 @@ signing key for rimage. If RIMAGE_INSTALL_DIR is not provided, rimage will be se
 where SOF project installs it. Dummy module sets up toolchain file in the project file.
 However, in your library you can select toolchain file in the configure step command:
 
-    cmake -B build -G <Ninja/Makefile> --toolchain "../../cmake/xtensa-toolchain.cmake" -DSNIGNING_KEY="path/to/key"
+    cmake -B build -G <Ninja/Makefile> --toolchain "../../cmake/xtensa-toolchain.cmake" -DSIGNING_KEY="path/to/key"