.github/workflows/guix: Don't specify the package name

* .github/workflows/guix.yml: Don't specify the package name for "guix build"
  as it must be taken from "guix.scm".

Author: artyom-poptsov

.github/workflows/guix.yml

@@ -32,7 +32,7 @@ jobs:
         uses: "actions/checkout@v3"
       - name: "Build project guile-ssh"
         run: |
-          guix build --file=guix.scm guile-ssh
+          guix build --file=guix.scm
   aarch64-linux-gnu:
     runs-on: "ubuntu-latest"
     steps:
@@ -53,7 +53,7 @@ jobs:
         uses: "actions/checkout@v3"
       - name: "Build project guile-ssh"
         run: |
-          guix build --target=aarch64-linux-gnu --file=guix.scm guile-ssh
+          guix build --target=aarch64-linux-gnu --file=guix.scm
 
 # End of guix.yml
 ...