Fix pnpm not being detected correctly

Author: fhammerschmidt

src/PackageManagers.res

@@ -1,7 +1,8 @@
 @scope(("process", "env"))
 external execpath: option<string> = "npm_execpath"
 
-let packageManagers = ["npm", "pnpm", "yarn", "bun"]
+// pnpm must be before npm in this array, as npm is a substring of it
+let packageManagers = ["pnpm", "npm", "yarn", "bun"]
 let defaultPackageManager = "npm"
 
 let getActivePackageManager = () =>