enable CI on the 2.0.0 branch (#5474)

diff --git a/.github/workflows/1-unit.yaml b/.github/workflows/1-unit.yaml
index 225d860..dd60ac9 100644
--- a/.github/workflows/1-unit.yaml
+++ b/.github/workflows/1-unit.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 1 * * 1,3,5'
diff --git a/.github/workflows/2-system.yaml b/.github/workflows/2-system.yaml
index 58e293b..6ad5f85 100644
--- a/.github/workflows/2-system.yaml
+++ b/.github/workflows/2-system.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 2 * * 1,3,5'
diff --git a/.github/workflows/3-multi-runtime.yaml b/.github/workflows/3-multi-runtime.yaml
index 6eace42..a7a7d83 100644
--- a/.github/workflows/3-multi-runtime.yaml
+++ b/.github/workflows/3-multi-runtime.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 3 * * 1,3,5'
diff --git a/.github/workflows/4-standalone.yaml b/.github/workflows/4-standalone.yaml
index a7a3109..009ad35 100644
--- a/.github/workflows/4-standalone.yaml
+++ b/.github/workflows/4-standalone.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 4 * * 1,3,5'
diff --git a/.github/workflows/5-scheduler.yaml b/.github/workflows/5-scheduler.yaml
index 51221b0..3f5b871 100644
--- a/.github/workflows/5-scheduler.yaml
+++ b/.github/workflows/5-scheduler.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 5 * * 1,3,5'
diff --git a/.github/workflows/6-performance.yaml b/.github/workflows/6-performance.yaml
index a390bd2..4435810 100644
--- a/.github/workflows/6-performance.yaml
+++ b/.github/workflows/6-performance.yaml
@@ -19,9 +19,9 @@
 
 on:
   push:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
   pull_request:
-    branches: [ master ]
+    branches: [ master, 2.0.0 ]
     types: [ opened, synchronize, reopened ]
   schedule:
     - cron: '30 6 * * 1,3,5'