CircleCI: contracts-bedrock-checks / fix semver-diff-check-no-build

[syntrust]

This is another PR to fix #111

Error log:

./scripts/checks/check-semver-diff.sh
❌ Error: Could not find semver-lock.json in the snapshots/ directory of develop branch
error: Recipe `semver-diff-check-no-build` failed on line 155 with exit code 1

Exited with code exit status 1

Fix:

Use the correct branch op-es instead of develop.

[qzhodl]

Is this PR ready for review?