build(deps): bump dask from 2023.3.1 to 2023.9.0

Bumps [dask](https://github.com/dask/dask) from 2023.3.1 to 2023.9.0.
- [Changelog](https://github.com/dask/dask/blob/main/docs/release-procedure.md)
- [Commits](dask/dask@2023.3.1...2023.9.0)

---
updated-dependencies:
- dependency-name: dask
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -30,7 +30,7 @@ contourpy==1.0.7
     # via matplotlib
 cycler==0.11.0
     # via matplotlib
-dask==2023.3.1
+dask==2023.9.0
     # via -r requirements.in
 eccodes==1.5.1
     # via cfgrib
@@ -44,6 +44,8 @@ fonttools==4.38.0
     # via matplotlib
 fsspec==2023.1.0
     # via dask
+importlib-metadata==6.8.0
+    # via dask
 importlib-resources==5.10.2
     # via matplotlib
 jinja2==3.1.2
@@ -122,4 +124,6 @@ typing-extensions==4.4.0
 xarray==2023.3.0
     # via -r requirements.in
 zipp==3.13.0
-    # via importlib-resources
+    # via
+    #   importlib-metadata
+    #   importlib-resources