chore: Update acir_tests script to point to master (#2650)

Reference this PR for more info:
noir-lang/noir#2965

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
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- [ ] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [X] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [X] Every change is related to the PR description.
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this pull request to relevant issues (if any exist).

barretenberg/acir_tests/run_acir_tests.sh

@@ -7,7 +7,7 @@ set -eu
 BIN=${BIN:-../cpp/build/bin/bb}
 FLOW=${FLOW:-prove_and_verify}
 CRS_PATH=~/.bb-crs
-BRANCH=mv/recursion-script
+BRANCH=master
 VERBOSE=${VERBOSE:-}
 NAMED_TEST=${1:-}