Update build.yml

Author: anubhavkrishna1

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
         sudo apt-get install -y build-essential gdb lcov pkg-config \
         libbz2-dev libffi-dev libgdbm-dev libgdbm-compat-dev liblzma-dev \
         libncurses5-dev libreadline6-dev libsqlite3-dev libssl-dev \
-        lzma lzma-dev tk-dev uuid-dev zlib1g-dev libmpdec-dev \
+        lzma lzma-dev tk-dev uuid-dev zlib1g-dev \
         wget curl llvm make
 
     - name: Download Python source