Update region tags

[psx95]

• Add a missing region tag
• Update existing tag 'opentelemetry_autoconf_configure_sdk' to capture more context.

[snippet-bot]

Here is the summary of changes.

You are about to add 2 region tags.

• examples/otlptrace/build.gradle:32, tag opentelemetry_otlp_auth_deps
• examples/otlptrace/src/main/java/com/google/cloud/opentelemetry/example/otlptrace/OTLPTraceExample.java:67, tag opentelemetry_autoconf_configure_sdk

You are about to delete 1 region tag.

• examples/otlptrace/src/main/java/com/google/cloud/opentelemetry/example/otlptrace/OTLPTraceExample.java:68, tag opentelemetry_autoconf_configure_sdk

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