Npgsql: Update to 7.0.9

Author: amotl

.github/workflows/lang-npgsql.yml

@@ -43,7 +43,7 @@ jobs:
       matrix:
         os: [ 'ubuntu-latest' ]
         dotnet-version: [ '7.0.x', '8.0.x', '9.0.x' ]
-        npgsql-version: [ '7.0.8', '8.0.6' ]
+        npgsql-version: [ '7.0.9', '8.0.6' ]
         cratedb-version: [ 'nightly' ]
 
     # https://docs.github.com/en/free-pro-team@latest/actions/guides/about-service-containers