refactor: rename keep versions input

entrypoint.sh

@@ -23,14 +23,14 @@ resolve_token() {
 }
 
 resolve_keep_versions() {
-  local raw_value="${INPUT_KEEP_VERSIONS:-2}"
+  local raw_value="${INPUT_KEEP_COUNT:-2}"
 
   if [[ -z "${raw_value}" ]]; then
     raw_value="2"
   fi
 
   if [[ ! "${raw_value}" =~ ^[0-9]+$ ]]; then
-    fail "Invalid keep_versions: ${raw_value}"
+    fail "Invalid keep_count: ${raw_value}"
   fi
 
   printf '%s' "${raw_value}"
@@ -218,7 +218,7 @@ main() {
   export RESOLVED_GITEA_TOKEN="$token"
   init_repo_context
   keep_versions="$(resolve_keep_versions)"
-  log "keep_versions=${keep_versions}"
+  log "keep_count=${keep_versions}"
   log "Token source resolved successfully"
 
   CANDIDATES_FILE="$(mktemp)"