GHA: Do not build on 5.5.3

/__e/node20/bin/node: /lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.28' not found (required by /__e/node20/bin/node)

Author: helje5

.github/workflows/swift.yml

@@ -14,7 +14,6 @@ jobs:
       fail-fast: false
       matrix:
         image:
-          - swift:5.5.3-xenial
           - swift:5.8-jammy
           - swift:5.10.1-noble
     container: ${{ matrix.image }}