fix: Set the current folder as a "primary" for the find command (apache#2120)

Author: martin-g

dev/release/verify-release-candidate.sh

@@ -124,7 +124,7 @@ test_source_distribution() {
   cargo build
   cargo test --all-features
 
-  if ( find -iname 'Cargo.toml' | xargs grep SNAPSHOT ); then
+  if ( find . -iname 'Cargo.toml' | xargs grep SNAPSHOT ); then
     echo "Cargo.toml version should not contain SNAPSHOT for releases"
     exit 1
   fi