Bump the actions group with 2 updates

Updates the requirements on [altair](https://github.com/vega/altair) and [netcdf4](https://github.com/Unidata/netcdf4-python) to permit the latest version.

Updates `altair` to 5.4.1
- [Release notes](https://github.com/vega/altair/releases)
- [Commits](vega/altair@1.0.0...v5.4.1)

Updates `netcdf4` to 1.7.1.post2
- [Release notes](https://github.com/Unidata/netcdf4-python/releases)
- [Changelog](https://github.com/Unidata/netcdf4-python/blob/master/Changelog)
- [Commits](Unidata/netcdf4-python@v1.cd...v1.7.1.post2)

---
updated-dependencies:
- dependency-name: altair
  dependency-type: direct:production
  dependency-group: actions
- dependency-name: netcdf4
  dependency-type: direct:production
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -9,7 +9,7 @@ dependencies = [
     "setuptools",
     "alphapept>=0.5.2",
     # TODO investigate
-    "altair<5.4.0",
+    "altair<5.5.0",
     "h5py>=3.10.0",
     "matplotlib>=3.8.2",
     "multiprocess",
@@ -36,7 +36,7 @@ dependencies = [
     "vegafusion[embed]>=1.6.5",
     "xarray",
     # TODO unpin when https://github.com/Unidata/netcdf4-python/issues/1343 is resolved
-    "netCDF4<=1.7.1",
+    "netCDF4<=1.7.1.post2",
     # TODO actually figure out which is the most useful, there is also tifffile and ome-types
     "pyometiff>=1.0.0",
     "ome-types>=0.5.1",