change default value of fortran.fortls.path to an empty string

Author: michaelkonecny

package.json

@@ -394,8 +394,8 @@
         "properties": {
           "fortran.fortls.path": {
             "type": "string",
-            "default": "fortls",
-            "markdownDescription": "Path to the Fortran language server (`fortls`).",
+            "default": "",
+            "markdownDescription": "Path to the Fortran language server (`fortls`) (must be absolute).",
             "order": 10
           },
           "fortran.fortls.configure": {