Try jammy repo

.github/workflows/build-special.yml

@@ -33,7 +33,7 @@ jobs:
 
         include:
           - name: ubuntu-clang-deprecated
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             compiler: clang
             version: "14"
             flag: deprecated
@@ -69,7 +69,10 @@ jobs:
       - name: Install (Linux)
         if: runner.os == 'Linux'
         run: |
-          # LLVM (clang) 9/14 is not in Bionic's repositories so we add the official LLVM repository.
+          sudo apt-get -y update
+          sudo apt-get -y install software-properties-common
+
+          # LLVM (clang) 9/14 is not in 22.04 (jammy)'s repositories so we add the official LLVM repository.
           if [ "${{ matrix.compiler }}" = "clang" ]; then
             # (ipv4|ha).pool.sks-keyservers.net is the SKS GPG global keyserver pool
             # ipv4 avoids potential timeouts because of crappy IPv6 infrastructure
@@ -78,10 +81,9 @@ jobs:
             LLVM_KEY=15CF4D18AF4F7421
             gpg --keyserver keyserver.ubuntu.com --recv-key $LLVM_KEY || gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-key $LLVM_KEY
             gpg -a --export $LLVM_KEY | sudo apt-key add -
-            sudo add-apt-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main"
+            sudo add-apt-repository "deb deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy main" main"
           fi
 
-          sudo apt-get -y update
           sudo apt-get -y install cmake build-essential pkg-config libpython3-dev python3-numpy libicu-dev
 
           sudo apt-get install -y clang-${{ matrix.version }} g++-multilib