Fix typo

Author: jysh1214

.github/setup-apt.sh

@@ -5,4 +5,4 @@ dpkg --add-architecture i386
 apt update
 apt install -y autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev \
             libgmp-dev gawk build-essential bison flex texinfo gperf libtool \
-            patchutils bc zlib1g-dev libexpat-dev git ninja-build cmake ibglib2.0-dev expect
+            patchutils bc zlib1g-dev libexpat-dev git ninja-build cmake libglib2.0-dev expect

README.md

@@ -20,7 +20,7 @@ Several standard packages are needed to build the toolchain.
 
 On Ubuntu, executing the following command should suffice:
 
-    $ sudo apt-get install autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev ninja-build git cmake ibglib2.0-dev
+    $ sudo apt-get install autoconf automake autotools-dev curl python3 libmpc-dev libmpfr-dev libgmp-dev gawk build-essential bison flex texinfo gperf libtool patchutils bc zlib1g-dev libexpat-dev ninja-build git cmake libglib2.0-dev
 
 On Fedora/CentOS/RHEL OS, executing the following command should suffice: