ci: enable cancel-in-progress for workflows to prevent duplicate runs

Author: hyperfinitism

.github/workflows/lint.yml

@@ -4,6 +4,10 @@ on:
   pull_request:
   push:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 

.github/workflows/spdx.yml

@@ -4,6 +4,10 @@ on:
   pull_request:
   push:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read
 

.github/workflows/test.yml

@@ -4,6 +4,10 @@ on:
   pull_request:
   push:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 permissions:
   contents: read