CI: Set MICROPY_GIT_TAG and MICROPY_GIT_HASH for #752.

.github/workflows/micropython.yml

@@ -125,6 +125,12 @@ jobs:
       with:
         submodules: true
         path: pimoroni-pico-${{ github.sha }}
+
+    - name: Set MicroPython Version Env Vars
+      shell: bash
+      run: |
+        echo "MICROPY_GIT_TAG=$MICROPYTHON_VERSION, ${{matrix.name}} ${{github.event.release.tag_name || github.sha}}" >> $GITHUB_ENV
+        echo "MICROPY_GIT_HASH=$MICROPYTHON_VERSION-${{github.event.release.tag_name || github.sha}}" >> $GITHUB_ENV
   
     - name: "HACK: Revert Pico SDK Patch"  # Avoid an already-patched MicroPython tree breaking our build
       shell: bash