chore(release): pin conventional changelog to get releases working

Author: gforsyth

ci/release/dry_run.sh

@@ -42,7 +42,7 @@ nix develop '.#release' -c npx --yes \
   -p "@semantic-release/exec" \
   -p "@semantic-release/git" \
   -p "@google/[email protected]" \
-  -p "conventional-changelog-conventionalcommits" \
+  -p "conventional-changelog-conventionalcommits@6.1.0" \
   semantic-release \
   --ci \
   --dry-run \

ci/release/run.sh

@@ -11,5 +11,5 @@ nix develop '.#release' -c npx --yes \
   -p "@semantic-release/exec" \
   -p "@semantic-release/git" \
   -p "@google/[email protected]" \
-  -p "conventional-changelog-conventionalcommits" \
+  -p "conventional-changelog-conventionalcommits@6.1.0" \
   semantic-release --ci