[workflows] Replace release_17x CI jobs with release_19x ones

Author: bryanpkc

.github/workflows/build_flang.yml

@@ -22,16 +22,16 @@ jobs:
         target: [X86]
         cc: [clang]
         version: [14, 15]
-        llvm_branch: [release_17x, release_18x]
+        llvm_branch: [release_18x, release_19x]
         include:
           - target: X86
             cc: gcc
             version: 12
-            llvm_branch: release_17x
+            llvm_branch: release_18x
           - target: X86
             cc: gcc
             version: 12
-            llvm_branch: release_18x
+            llvm_branch: release_19x
 
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so the job can access it

.github/workflows/build_flang_arm64.yml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       matrix:
         target: [AArch64]
-        llvm_branch: [release_17x, release_18x]
+        llvm_branch: [release_18x, release_19x]
 
     steps:
       - name: Check tools

.github/workflows/build_flang_windows.yml

@@ -20,7 +20,7 @@ jobs:
         os:
           - windows-latest
           # - self-hosted
-        llvm_branch: [release_17x, release_18x]
+        llvm_branch: [release_18x, release_19x]
         include:
           - os: windows-latest
             arch: amd64