ci/github: update llhttp

.github/workflows/ccpp.yml

 name: C/C++ CI
 
 env:
-  LLHTTP_VERSION: "v9.2.0"
+  LLHTTP_VERSION: "v9.2.1"
   RESTINIO_VERSION: "0.7.3"
   EXPECTED_LITE_URL: "https://raw.githubusercontent.com/martinmoene/expected-lite/master/include/nonstd/expected.hpp"
   UBUNTU_FULL_DEPS: "libncurses5-dev libreadline-dev nettle-dev libasio-dev libgnutls28-dev libuv1-dev python3-pip python3-dev python3-setuptools libcppunit-dev libjsoncpp-dev autotools-dev autoconf libfmt-dev libmsgpack-dev libargon2-dev"
@@ -20,8 +20,8 @@ jobs:
       - name: Install Dependencies
         run: |
           echo "Installing Ubuntu full dependencies:"
-          sudo apt update
-          sudo apt install -y $UBUNTU_FULL_DEPS
+          sudo apt-get update
+          sudo apt-get install -y $UBUNTU_FULL_DEPS
 
       - name: Install Cython
         run: sudo pip3 install Cython
@@ -91,8 +91,8 @@ jobs:
       - name: Install Minimal Dependencies
         run: |
           echo "Installing Ubuntu minimal dependencies:"
-          sudo apt update
-          sudo apt install -y $UBUNTU_MINIMAL_DEPS
+          sudo apt-get update
+          sudo apt-get install -y $UBUNTU_MINIMAL_DEPS
 
       - name: Configure project with CMake
         run: |