Update redirects in conf.py

Removed outdated redirect for carbon-management.nc and fixed syntax error in release-notes index.

Author: lkstrp

conf.py

@@ -20,8 +20,7 @@
 # -- Redirects configuration ------------------------------------------------
 redirects = {
     "report-bug/index": "https://github.com/PyPSA/PyPSA/issues/new?template=bug_report.yaml",
-    "examples/carbon-management.nc/index": "https://tubcloud.tu-berlin.de/s/3qZPGxW3r4HF9Hn/download?path=%2F&files=carbon-management.nc",
     "new-components-api/index": "https://docs.pypsa.org/latest/user-guide/components/#new-components-class-api",
     "options-params/index": "https://docs.pypsa.org/latest/user-guide/options/#parameters-options",
-    "release-notes/index:" "https://docs.pypsa.org/latest/release-notes/",
+    "release-notes/index": "https://docs.pypsa.org/latest/release-notes/",
 }