ci: verify purs instead od purescript

Author: tsirysndr

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Show Purescript version
         run: |
           export PATH=${HOME}/.bun/bin:${PATH}
-          type purescript
+          type purs
           type spago
-          purescript --version
+          purs --version
           spago --version

README.md

@@ -61,8 +61,8 @@ Github Actions:
 - name: Show purescript version
   run: |
     export PATH=${HOME}/.bun/bin:${PATH}
-    type purescript
+    type purs
     type spago
-    purescript --version
+    purs --version
     spago --version
 ```