build: run CI on release branches

PR-URL: #34649
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Mary Marchini <oss@mmarchini.me>

.github/workflows/build-tarball.yml

@@ -5,6 +5,8 @@ on:
   push:
     branches:
       - master
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   FLAKY_TESTS: dontcare

.github/workflows/build-windows.yml

@@ -6,6 +6,8 @@ on:
     branches:
       - master
       - canary
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   PYTHON_VERSION: 3.8

.github/workflows/linters.yml

@@ -5,6 +5,8 @@ on:
   push:
     branches:
       - master
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   PYTHON_VERSION: 3.8

.github/workflows/misc.yml

@@ -5,6 +5,8 @@ on:
   push:
     branches:
       - master
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   NODE_VERSION: 12.x

.github/workflows/test-asan.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - master
       - canary
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
     paths-ignore:
       - 'doc/**'
   pull_request:

.github/workflows/test-linux.yml

@@ -6,6 +6,8 @@ on:
     branches:
       - master
       - canary
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   PYTHON_VERSION: 3.8

.github/workflows/test-macos.yml

@@ -6,6 +6,8 @@ on:
     branches:
       - master
       - canary
+      - v[0-9]+.x-staging
+      - v[0-9]+.x
 
 env:
   PYTHON_VERSION: 3.8