Bump pympipool from 0.7.14 to 0.7.15

Bumps [pympipool](https://github.com/pyiron/pympipool) from 0.7.14 to 0.7.15.
- [Release notes](https://github.com/pyiron/pympipool/releases)
- [Commits](pyiron/executorlib@pympipool-0.7.14...pympipool-0.7.15)

---
updated-dependencies:
- dependency-name: pympipool
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pyproject.toml

@@ -43,7 +43,7 @@ remote = [
     "tqdm==4.66.2",
 ]
 executor = [
-    "pympipool==0.7.14",
+    "pympipool==0.7.15",
     "cloudpickle==3.0.0",
 ]
 twofactor = ["pyauthenticator==0.2.0"]