Fix ispc-trunk-linux.tar.gz url

Author: nurmukhametov

downloads.html

@@ -109,7 +109,7 @@ <h1>Downloading The Intel® Implicit SPMD Program Compiler</h1>
           <ul>
             <li><a href="https://ci.appveyor.com/api/projects/ispc/ispc/artifacts/build%2Fispc-trunk-windows.zip?job=Environment%3A%20APPVEYOR_BUILD_WORKER_IMAGE%3DVisual%20Studio%202019%2C%20LLVM_VERSION%3Dlatest">Windows (64 bit)
             ispc binary (v1.25.0dev)</a></li>
-			<li><a href="https://ci.appveyor.com/api/projects/ispc/ispc/artifacts/build%2Fispc-trunk-linux.tar.gz?job=Environment%3A%20APPVEYOR_BUILD_WORKER_IMAGE%3DUbuntu1804%2C%20LLVM_VERSION%3Dlatest">Linux (64 bit)
+			<li><a href="https://ci.appveyor.com/api/projects/ispc/ispc/artifacts/build%2Fispc-trunk-linux.tar.gz?job=Environment%3A%20APPVEYOR_BUILD_WORKER_IMAGE%3DUbuntu2204%2C%20LLVM_VERSION%3Dlatest">Linux (64 bit)
             ispc binary (v1.25.0dev)</a></li>
             </ul>
           <p>