build(deps): bump linkerd2-proxy-api from 0.3.0 to 0.3.1 (#1419)

Bumps linkerd2-proxy-api from 0.3.0 to 0.3.1.

---
updated-dependencies:
- dependency-name: linkerd2-proxy-api
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.lock

@@ -1656,9 +1656,9 @@ dependencies = [
 
 [[package]]
 name = "linkerd2-proxy-api"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d20d7fd6e5b0f0af5cecca5deded293266ae5cfb3aff31ef632da48640ca522"
+checksum = "c6aaf91178c272abeaac52b2472351e73affa723bfdd0c15e147e2f975f2fbe5"
 dependencies = [
  "h2",
  "http",