try to ignore requirements-sdp.txt for dependabot (#9051)

.github/dependabot.yml

@@ -14,6 +14,8 @@ updates:
   - package-ecosystem: "pip"
     directory: "/"
     target-branch: "main"
+    ignore:
+      - dependency-name: "requirements-sdp.txt"
     schedule:
       interval: "weekly"
     reviewers:

requirements-sdp.txt

@@ -14,81 +14,3 @@
 #     conda activate sdp
 #     pip install -e .[test,sdp]
 #     pip freeze | grep -v jwst >> requirements-sdp.txt
-asdf==4.0.0
-asdf-astropy==0.7.0
-asdf_coordinates_schemas==0.3.0
-asdf_standard==1.1.1
-asdf_transform_schemas==0.5.0
-asdf_wcs_schemas==0.4.0
-astropy==7.0.0
-astropy-iers-data==0.2024.12.30.0.33.36
-attrs==24.3.0
-BayesicFitting==3.2.3
-certifi==2024.12.14
-charset-normalizer==3.4.1
-ci_watson==0.8.0
-colorama==0.4.6
-contourpy==1.3.1
-coverage==7.6.10
-crds==12.0.9
-cycler==0.12.1
-drizzle==2.0.0
-et_xmlfile==2.0.0
-filelock==3.16.1
-fonttools==4.55.3
-future==1.0.0
-gwcs==0.22.1
-idna==3.10
-imageio==2.36.1
-importlib_metadata==8.5.0
-iniconfig==2.0.0
-jmespath==1.0.1
-jplephem==2.22
-jsonschema==4.23.0
-jsonschema-specifications==2024.10.1
-kiwisolver==1.4.8
-lazy_loader==0.4
-lxml==5.3.0
-matplotlib==3.10.0
-networkx==3.4.2
-numpy==1.26.4
-opencv-python-headless==4.10.0.84
-openpyxl==3.1.5
-packaging==24.2
-Parsley==1.3
-photutils==2.0.2
-pillow==11.1.0
-pluggy==1.5.0
-poppy==1.1.1
-pyerfa==2.0.1.5
-pyparsing==3.2.1
-pysiaf==0.24.1
-pytest==8.3.4
-pytest-cov==6.0.0
-pytest-doctestplus==1.3.0
-python-dateutil==2.9.0.post0
-PyYAML==6.0.2
-readchar==4.2.1
-referencing==0.35.1
-requests==2.32.3
-requests-mock==1.12.1
-rpds-py==0.22.3
-ruff==0.8.5
-scikit-image==0.25.0
-scipy==1.14.1
-semantic-version==2.10.0
-setuptools==75.6.0
-six==1.17.0
-spherical_geometry==1.3.2
-stcal==1.11.0
-stdatamodels==2.2.0
-stpipe==0.8.0
-stsci.imagestats==1.8.3
-stsci.stimage==0.2.9
-synphot==1.5.0
-tifffile==2024.12.12
-tweakwcs==0.8.9
-urllib3==2.3.0
-wheel==0.45.1
-wiimatch==0.3.2
-zipp==3.21.0