Separate syntax tests GitHub actions.

Author: nk9

.github/workflows/syntax-tests-4075.yml

@@ -0,0 +1,36 @@
+name: Syntax Tests
+
+on:
+  push:
+    branches:
+      - "4075"
+    paths:
+      - '.github/workflows/syntax-tests.yml'
+      - '**.sublime-syntax'
+      - '**/syntax_test*'
+      - '**.tmPreferences'
+  pull_request:
+    branches:
+      - "4075"
+    paths:
+      - '.github/workflows/syntax-tests.yml'
+      - '**.sublime-syntax'
+      - '**/syntax_test*'
+      - '**.tmPreferences'
+
+jobs:
+  main:
+    name: Syntax Tests (${{ matrix.build }})
+    strategy:
+      matrix:
+        include:
+          - build: 4143     # last stable build before 4148
+            packages: v4143 # last stable build before 4148
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: SublimeText/syntax-test-action@v2
+        with:
+          build: ${{ matrix.build }}
+          default_packages: ${{ matrix.packages }}
+          package_name: Just

.github/workflows/syntax-tests.yml

@@ -2,12 +2,16 @@ name: Syntax Tests
 
 on:
   push:
+    branches:
+      - "main"
     paths:
       - '.github/workflows/syntax-tests.yml'
       - '**.sublime-syntax'
       - '**/syntax_test*'
       - '**.tmPreferences'
   pull_request:
+    branches:
+      - "main"
     paths:
       - '.github/workflows/syntax-tests.yml'
       - '**.sublime-syntax'
@@ -20,8 +24,8 @@ jobs:
     strategy:
       matrix:
         include:
-          - build: 4129     # latest as of 7 Dec 2022
-            packages: v4129 # latest as of 7 Dec 2022
+          - build: "latest"
+            packages: master
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2