software/slapos-sr-testing: Use curl-http3

software/slapos-sr-testing/software.cfg

@@ -394,7 +394,7 @@ context =
   key git_location git:location
   key slapos_location slapos-repository:location
   key interpreter python-interpreter:interpreter
-  key curl_location curl:location
+  key curl_location curl-http3:location
   key openssl_location openssl-output:bin
   key faketime_location faketime:location
   key tests :tests