Add a manual trigger to force CI to bump crate versions

I'm curious to try out the full workflow so instead of waiting a few
weeks I figured I'd add a manual trigger here too

ci/force-ci-bump-version.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+if [ -z "$PERSONAL_ACCESS_TOKEN" ]; then
+  echo "need to set \$PERSONAL_ACCESS_TOKEN to a github token"
+  exit 1
+fi
+
+exec curl --include --request POST \
+  https://api.github.com/repos/bytecodealliance/wasmtime/actions/workflows/bump-version.yml/dispatches \
+  --header "Authorization: token $PERSONAL_ACCESS_TOKEN" \
+  --data @- << EOF
+{
+  "ref": "main"
+}
+EOF
+