add 3.7.2 into the lineup

Author: dalehenrich

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest, ubuntu-22.04 ]
-        smalltalk: [ GemStone64-3.7.4.3, GemStone64-3.7.1, GemStone64-3.7.0 ]
+        smalltalk: [ GemStone64-3.7.4.3, GemStone64-3.7.2, GemStone64-3.7.1, GemStone64-3.7.0 ]
     runs-on: ${{ matrix.os }}
     env:
       GS_VERS: ${{ matrix.gsvers }}