deps: bump arrayvec from 0.7.4 to 0.7.6

Bumps [arrayvec](https://github.com/bluss/arrayvec) from 0.7.4 to 0.7.6.
- [Release notes](https://github.com/bluss/arrayvec/releases)
- [Changelog](https://github.com/bluss/arrayvec/blob/master/CHANGELOG.md)
- [Commits](bluss/arrayvec@0.7.4...0.7.6)

---
updated-dependencies:
- dependency-name: arrayvec
  dependency-version: 0.7.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ keywords = ["peer-to-peer", "libp2p", "networking"]
 categories = ["network-programming", "asynchronous"]
 
 [dependencies]
-arrayvec = "0.7.4"
+arrayvec = "0.7.6"
 bytes = "1"
 either = "1.9"
 fnv = "1.0"