chore(ci): reduce ci usage

Specifically avoid duplicating the number of CI runs by being more
specific about when to run CI on PRs and pushes

Signed-off-by: JP-Ellis <[email protected]>

.github/workflows/examples.yml

@@ -1,8 +1,16 @@
 name: Pact Plugin Examples
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   csv-examples:

.github/workflows/gradle.yml

@@ -1,8 +1,16 @@
 name: Pact Plugin Driver (Gradle)
 
 on:
-  - push
-  - pull_request
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   latest_jdk:

.github/workflows/plugin-cli.yml

@@ -1,6 +1,16 @@
 name: Pact Plugin CLI
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   build:

.github/workflows/release.yml

@@ -2,14 +2,17 @@ name: Release workflow
 
 on:
   release:
-    types: [published]
-
+    types:
+      - published
+  push:
+    branches:
+      - main
   pull_request:
     branches:
       - main
-  
+
 concurrency:
-  group: release-${{ github.ref }}
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
   cancel-in-progress: true
 
 jobs:

.github/workflows/rust.yml

@@ -1,6 +1,19 @@
 name: Pact Plugin Driver (Rust)
 
-on: [push, pull_request]
+on:
+  release:
+    types:
+      - published
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   build: