fix: install numba and pynufft on Python 3.13, skip only tf-probability

The previous commit skipped all [optional] deps on 3.13 but tests
need numba and pynufft. Only tensorflow-probability lacks 3.13 wheels.
Also add fail-fast: false so both matrix jobs always run.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

.github/workflows/main.yml

@@ -6,6 +6,7 @@ jobs:
   unittest:
     runs-on: ubuntu-latest
     strategy:
+      fail-fast: false
       matrix:
         python-version: ['3.12', '3.13']
     steps:
@@ -39,6 +40,8 @@ jobs:
         pip install ./PyAutoConf ./PyAutoArray
         if [ "${{ matrix.python-version }}" = "3.12" ]; then
           pip install "./PyAutoArray[optional]"
+        else
+          pip install numba pynufft
         fi
 
     - name: Extract branch name