Update dependency pnpm to v9.15.6 (#700)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ on:
 env:
   FORCE_COLOR: 1
   # renovate: datasource=npm depName=pnpm
-  PNPM_VERSION: 9.15.5
+  PNPM_VERSION: 9.15.6
   # renovate: datasource=npm depName=auto-dist-tag
   AUTO_DIST_TAG_VERSION: 2.1.1