chore(ci): Fix previously unknown issue in combiners_showcase example

Author: nhubbard

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
 
       - name: Run Clippy with pedantic and nursery
         run: |
-          cargo clippy --all-targets --all-features -- \
+          cargo clippy -p ironbeam --all-targets --all-features -- \
             -W clippy::pedantic \
             -W clippy::nursery \
             -D warnings

examples/combiners_showcase.rs

@@ -36,7 +36,7 @@ fn main() -> Result<()> {
         &pipeline,
         transactions
             .iter()
-            .map(|(cat, price)| (cat.to_string(), *price))
+            .map(|(cat, price)| ((*cat).to_string(), *price))
             .collect(),
     );