add concurrency control to workflows

Essentially cancel previous workflows when new commits are pushed.

Author: RobinMalfait

.github/workflows/ci.yml

@@ -11,6 +11,10 @@ permissions:
 env:
   NODE_VERSION: 24
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     strategy:

.github/workflows/integration-tests.yml

@@ -11,6 +11,10 @@ permissions:
 env:
   NODE_VERSION: 24
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   tests:
     strategy:

.github/workflows/prepare-release.yml

@@ -14,6 +14,10 @@ env:
 permissions:
   contents: read
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     strategy:

.github/workflows/release-insiders.yml

@@ -13,6 +13,10 @@ env:
   OXIDE_LOCATION: ./crates/node
   RELEASE_CHANNEL: insiders
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     strategy: