docs: add release notes

docs/release-notes/release-notes-0.13.7.md

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+# Release Notes
+
+- [Lightning Terminal](#lightning-terminal)
+    - [Bug Fixes](#bug-fixes)
+    - [Functional Changes/Additions](#functional-changesadditions)
+    - [Technical and Architectural Updates](#technical-and-architectural-updates)
+- [Integrated Binary Updates](#integrated-binary-updates)
+    - [LND](#lnd)
+    - [Loop](#loop)
+    - [Pool](#pool)
+    - [Faraday](#faraday)
+    - [Taproot Assets](#taproot-assets)
+- [Contributors](#contributors-alphabetical-order)
+
+## Lightning Terminal
+
+### Bug Fixes
+
+* [Disable the `GRPC` internal low-level connection logger by
+  default](https://github.com/lightninglabs/lightning-terminal/pull/896).
+  It can still be enabled by adding `,GRPC=info` at the end of the
+  `lnd.debuglevel` or `remote.lit-debuglevel` configuration options.
+
+### Functional Changes/Additions
+
+### Technical and Architectural Updates
+
+## Integrated Binary Updates
+
+### LND
+
+### Loop
+
+### Pool
+
+### Faraday
+
+### Taproot Assets
+
+# Contributors (Alphabetical Order)
+
+- Oliver Gugger