chore: Loosen metrics gems versions (#1698)

The OTLP metrics exporter will fail to install for tests because the
latest metrics SDK is newer than the previous version constraint.
The rest of the gems are installed based on minor versions.
Now metrics_sdk/_api are in sync.

exporter/otlp-metrics/opentelemetry-exporter-otlp-metrics.gemspec

@@ -29,8 +29,8 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'google-protobuf', '>= 3.18', '< 5.0'
   spec.add_dependency 'opentelemetry-api', '~> 1.1'
   spec.add_dependency 'opentelemetry-common', '~> 0.20'
-  spec.add_dependency 'opentelemetry-metrics-api', '~> 0.1.0'
-  spec.add_dependency 'opentelemetry-metrics-sdk', '~> 0.1.0'
+  spec.add_dependency 'opentelemetry-metrics-api', '~> 0.1'
+  spec.add_dependency 'opentelemetry-metrics-sdk', '~> 0.2'
   spec.add_dependency 'opentelemetry-sdk', '~> 1.2'
   spec.add_dependency 'opentelemetry-semantic_conventions'