Update Gitaly version to 14.9.3

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Update Gitaly version to 14.9.3
887a4294 · GitLab Release Tools Bot · 40419263 · 887a4294
Commit 887a4294 authored 2 years ago by GitLab Release Tools Bot
--- a/GITALY_SERVER_VERSION
+++ b/GITALY_SERVER_VERSION
-14.9.2
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+14.9.3
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