fix CI error that happens on each version bump (#100)

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## 💸 TL;DR
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Every time we create a release PR, first CI pass fails (example:
#99)
It's because yarn.lock needs to be updated
This PR adds a `yarn` step to the version bump script

## 📜 Details
[Design Doc](<!-- insert Google Doc link here if applicable -->)

[Jira](<!-- insert Jira link if applicable -->)

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- [ ] CI tests (if present) are passing
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Co-authored-by: danil.radkovskyi <danil.radkovskyi@reddit.com>

Author: Krakabek

scripts/commit-docs-bump.sh

@@ -2,6 +2,7 @@
 set -xeuo pipefail
 
 git checkout -b docs-release-$1
+yarn
 git add .
 git commit -m "v$1 release"
 git push --set-upstream origin docs-release-$1