Bump the minor group with 4 updates

---
updated-dependencies:
- dependency-name: grpcio
  dependency-version: 1.73.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: flake8
  dependency-version: 7.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: pytest
  dependency-version: 8.4.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
- dependency-name: grpcio-tools
  dependency-version: 1.73.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -11,8 +11,8 @@ requires = [
   # versions can't work with code that was generated with newer versions.
   # https://protobuf.dev/support/cross-version-runtime-guarantee/#backwards
   "protobuf == 5.29.5",
-  "grpcio-tools == 1.70.0",
-  "grpcio == 1.70.0",
+  "grpcio-tools == 1.73.1",
+  "grpcio == 1.73.1",
 ]
 build-backend = "setuptools.build_meta"
 
@@ -62,7 +62,7 @@ email = "[email protected]"
 
 [project.optional-dependencies]
 dev-flake8 = [
-  "flake8 == 7.2.0",
+  "flake8 == 7.3.0",
   "flake8-docstrings == 1.7.0",
   "flake8-pyproject == 1.2.3", # For reading the flake8 config from pyproject.toml
   "pydoclint == 0.6.6",
@@ -95,7 +95,7 @@ dev-pylint = [
   "frequenz-api-dispatch[dev-mkdocs,dev-noxfile,dev-pytest]",
 ]
 dev-pytest = [
-  "pytest == 8.3.5",
+  "pytest == 8.4.1",
   "frequenz-repo-config[extra-lint-examples] == 0.13.4",
 ]
 dev = [