build(deps): update opentelemetry-instrumentation-all requirement from ~> 0.77.0 to ~> 0.78.0

Updates the requirements on [opentelemetry-instrumentation-all](https://github.com/open-telemetry/opentelemetry-ruby-contrib) to permit the latest version.

Updates `opentelemetry-instrumentation-all` to 0.78.0
- [Release notes](https://github.com/open-telemetry/opentelemetry-ruby-contrib/releases)
- [Changelog](https://github.com/open-telemetry/opentelemetry-ruby-contrib/blob/main/instrumentation/all/CHANGELOG.md)
- [Commits](open-telemetry/opentelemetry-ruby-contrib@opentelemetry-instrumentation-all/v0.77.0...opentelemetry-instrumentation-all/v0.78.0)

---
updated-dependencies:
- dependency-name: opentelemetry-instrumentation-all
  dependency-version: 0.78.0
  dependency-type: direct:production
  dependency-group: opentelemetry-deps-ruby
...

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

Author: dependabot[bot]

ruby/src/otel/layer/Gemfile

@@ -2,4 +2,4 @@ source 'https://rubygems.org'
 
 gem 'opentelemetry-sdk', '~> 1.8.0'
 gem 'opentelemetry-exporter-otlp', '~> 0.30.0'
-gem 'opentelemetry-instrumentation-all', '~> 0.77.0'
+gem 'opentelemetry-instrumentation-all', '~> 0.78.0'