configure.sh: stop mentioning old fsx runners

Author: knocte

configure.sh

@@ -32,7 +32,7 @@ else
         if ! which fsx >/dev/null 2>&1; then
             echo "$FSX_CHECK_MSG" $'not found\n'
 
-            echo "$0" $'failed, please install "fsharpi" or "fsx" first'
+            echo "$0" $'failed, please install "dotnet" first'
             exit 1
         else
             echo "$FSX_CHECK_MSG" $'found'