Triggered the changes only for main base branch

Author: srinivasreddy

.github/workflows/reusable-change-detection.yml

@@ -119,13 +119,15 @@ jobs:
 
         CHANGED_FILES=$(git diff --name-only "origin/$GITHUB_BASE_REF..")
         # Check if changes are ONLY in configure/Makefile files
-        if echo "$CHANGED_FILES" | grep -qE '^(configure.*|Makefile.*|.*\.m4)$' && \
-            ! echo "$CHANGED_FILES" | grep -qvE '^(configure.*|Makefile.*|.*\.m4)$'; then
-          # Only configure/Makefile files changed, skip Windows CI
-          echo "run-windows=false" >> "$GITHUB_OUTPUT"
-        else
-          # Other files changed, run Windows CI
-          echo "run-windows=true" >> "$GITHUB_OUTPUT"
+        if [ "$GITHUB_BASE_REF" = "main" ]; then
+          if echo "$CHANGED_FILES" | grep -qE '^(configure.*|Makefile.*|.*\.m4)$' && \
+              ! echo "$CHANGED_FILES" | grep -qvE '^(configure.*|Makefile.*|.*\.m4)$'; then
+            # Only configure/Makefile files changed, skip Windows CI
+            echo "run-windows=false" >> "$GITHUB_OUTPUT"
+          else
+            # Other files changed, run Windows CI
+            echo "run-windows=true" >> "$GITHUB_OUTPUT"
+          fi
         fi
 
     - name: Compute hash for config cache key