Simplify GHA workflow if statements

Author: ruohola

.github/workflows/cd.yml

@@ -15,7 +15,7 @@ on:
 jobs:
   release:
     name: "Release"
-    if: ${{ github.ref == 'refs/heads/master' }}
+    if: github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout code"

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ concurrency:
 jobs:
   commits:
     name: "Commits"
-    if: ${{ github.event_name == 'pull_request' }}
+    if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest
     steps:
       - name: "Checkout code"