Temporarily enable tests with GMT 6.3

Author: seisman

.github/workflows/ci_tests_legacy.yaml

@@ -5,15 +5,15 @@ name: GMT Legacy Tests
 on:
   # push:
   #   branches: [ main ]
-  # pull_request:
-    # types: [ready_for_review]
-    # paths-ignore:
-    #  - 'doc/**'
-    #  - 'examples/**'
-    #  - '*.md'
-    #  - 'README.rst'
-    #  - 'LICENSE.txt'
-    #  - '.gitignore'
+  pull_request:
+    types: [ready_for_review]
+    paths-ignore:
+      - 'doc/**'
+      - 'examples/**'
+      - '*.md'
+      - 'README.rst'
+      - 'LICENSE.txt'
+      - '.gitignore'
   # Schedule tests on Tuesday
   schedule:
     - cron: '0 0 * * 2'