update rust to 1.76

[ChristianBeilschmidt]

• I added an entry to CHANGELOG.md if knowledge of this change could be valuable to users.

---

Here is a brief summary of what I did:

[coveralls]

Pull Request Test Coverage Report for Build 7863596756

• -5 of 15 (66.67%) changed or added relevant lines in 5 files are covered.
• 21 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.5%) to 90.371%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
services/src/datasets/storage.rs	0	1	0.0%
services/src/api/handlers/wms.rs	2	6	33.33%

Files with Coverage Reduction	New Missed Lines	%
services/src/api/handlers/datasets.rs	1	95.03%
services/src/bin/main.rs	1	0.0%
services/src/datasets/external/aruna/mock_grpc_server.rs	1	89.02%
services/src/datasets/external/netcdfcf/ebvportal_api.rs	1	90.63%
services/src/datasets/external/netcdfcf/ebvportal_provider.rs	1	92.87%
services/src/pro/permissions/postgres_permissiondb.rs	1	71.96%
services/src/pro/quota/mod.rs	1	94.98%
services/src/api/handlers/layers.rs	2	88.74%
services/src/api/handlers/workflows.rs	2	90.19%
services/src/pro/contexts/postgres.rs	4	96.96%

Totals
Change from base Build 7814711885:	0.5%
Covered Lines:	126067
Relevant Lines:	139500

---

💛 - Coveralls

[ChristianBeilschmidt]

Update Backend