fix: correct import statement in batch

[12rambau]

attempt to fix #201

This is a firefighter move before we start refactoring the batch methods. this package is still making relative imports from files that no longer exist in the lib. I think I corrected the 2 occurences but I'll need to be extra careful in my next modifications.

@Shima-shoki would you mind trying this branch in your code to check if there are no other import issues down the road ?

Simply run this in a previous cell:

!pip install 'geetools @ git+https://github.com/gee-community/geetools@batch'

[codecov[bot]]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (b1b327a) 36.47% compared to head (c2dd92f) 36.47%. Report is 1 commits behind head on main.

Files	Patch %	Lines
geetools/batch/image.py	0.00%	1 Missing :warning:
geetools/batch/imagecollection.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #204 +/- ## ======================================= Coverage 36.47% 36.47% ======================================= Files 52 52 Lines 2925 2925 Branches 296 296 ======================================= Hits 1067 1067 Misses 1853 1853 Partials 5 5 ```

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[Shima-shoki]

@12rambau Thank you very much for your prompt response to the issue! The following command you kindly shared worked fine to resolve the problem.

!pip install 'geetools @ git+https://github.com/gee-community/geetools@batch'

After executing above code in my Colab environment, the "batch" module looks successfully imported from geetools version 1.0.0 as shown in the attached screenshot.

[12rambau]

@Shima-shoki happy to hea! Then let me include this in the next patch release and you will be able to use latest published version without my little custom branch.