Enable GitHub Actions for 3.9 branch (GH-20231)

(cherry picked from commit c105f7d)

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: miss-islington

.github/workflows/build.yml

@@ -7,11 +7,13 @@ on:
   push:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
   pull_request:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
 

.github/workflows/build_msi.yml

@@ -4,13 +4,15 @@ on:
   push:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
     paths:
     - 'Tools/msi/**'
   pull_request:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
     paths:

.github/workflows/coverage.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
     paths-ignore:
@@ -12,6 +13,7 @@ on:
   #pull_request:
   #  branches:
   #  - master
+  #  - 3.9
   #  - 3.8
   #  - 3.7
   #  paths-ignore:

.github/workflows/doc.yml

@@ -4,13 +4,15 @@ on:
   #push:
   #  branches:
   #  - master
+  #  - 3.9
   #  - 3.8
   #  - 3.7
   #  paths:
   #  - 'Doc/**'
   pull_request:
     branches:
     - master
+    - 3.9
     - 3.8
     - 3.7
     paths: