fix: add concurrency settings to release and test workflows

Author: kasvith

.github/workflows/release.yml

@@ -7,6 +7,10 @@ on:
   push:
     tags: ["v*"]
 
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build_release:
     name: NIF ${{ matrix.nif }} - ${{ matrix.job.target }} (${{ matrix.job.os }})

.github/workflows/test.yml

@@ -9,6 +9,10 @@ on:
 env:
   HTMD_BUILD: true
 
+concurrency:
+  group: test-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     name: Test