Set integration-test-latest to continue_on_error

Closes informalsystems#304

We want to run the integration test against the latest version, but
don't want it to clutter CI with failures. Tests against the pinned
stable version still fail.

Also fixes some whitespace.

Signed-off-by: Shon Feder <shon@informal.systems>

.github/workflows/rust.yml

@@ -1,11 +1,11 @@
 name: Rust
-on: 
+on:
   pull_request:
     paths-ignore:
-      - 'docs/**'
+      - "docs/**"
   push:
     paths-ignore:
-      - 'docs/**'
+      - "docs/**"
     branches:
       - master
 jobs:
@@ -86,6 +86,8 @@ jobs:
           args: -p tendermint --test integration --no-fail-fast -- --ignored
 
   test-integration-latest:
+    # Don't fail CI due to integration failures on unstable/unreleased versions
+    continue-on-error: true
     runs-on: ubuntu-latest
     services:
       tendermint: