Change 'make libs' back to 'make'

Author: moluopro

docs/install.md

@@ -717,7 +717,7 @@ CC="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolcha
 SDKROOT="$(xcrun --sdk iphoneos --show-sdk-path)"
 CFLAGS="-O2 -Wno-macro-redefined -isysroot $SDKROOT -arch arm64 -miphoneos-version-min=10.0"
 
-make libs TARGET=ARMV8 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
+make TARGET=ARMV8 DYNAMIC_ARCH=1 NUM_THREADS=32 HOSTCC=clang NOFORTRAN=1
 ```
 Adjust `MIN_IOS_VERSION` as necessary for your installation. E.g., change the version number
 to the minimum iOS version you want to target and execute this file to build the library.