Resolve "python_syntax is python2 only"

Closes #48 (closed)

ci-templates/auto-rules/no-default.yml

@@ -49,15 +49,21 @@ industrial_ci_humble:
     - if: $DEFAULT_DISTRO == "humble"
     - if: $BUILD_HUMBLE
 
-.py3_template:
+py3_template:
+  extends: .py3_template
   rules:
     - if: $DEFAULT_DISTRO == "noetic"
       when: always
     - if: $BUILD_NOETIC
       when: always
+    - if: $DEFAULT_DISTRO == "humble"
+      when: always
+    - if: $BUILD_HUMBLE
+      when: always
   when: always
 
-.py2_template:
+py2_template:
+  extends: .py2_template
   rules:
     - if: $DEFAULT_DISTRO == "kinetic"
       when: always