CI: Bump littlefs-python version for LFS v2.1 support.

Change littlefs-python from v0.4.0 to v0.9.3, bumping the
LittleFS version from 2.2.1 to 2.9.0 and adding v2.1 FS
support.

See: micropython/micropython#12731

.github/workflows/micropython.yml

@@ -161,7 +161,7 @@ jobs:
     - name: Append Filesystem
       shell: bash
       run: |
-        python3 -m pip install littlefs-python==0.4.0
+        python3 -m pip install littlefs-python==0.9.3
         ./dir2uf2/dir2uf2 --fs-start ${{matrix.dir2uf2_fs_start}} --fs-size ${{matrix.dir2uf2_fs_size}} --append-to micropython/ports/rp2/build/${{env.RELEASE_FILE}} --manifest ${{env.BOARD_DIR}}/uf2-manifest.txt --filename with-badger-os.uf2 ${{env.BADGER_OS_DIR}}/
 
     - name: Store .uf2 as artifact