2021-09-23 Data Dictionary (#191)

## 🎫 Ticket

https://jira.cms.gov/browse/BCDA-BCDA-7846

## 🛠 Changes

Updating Data Dictionary to be one file and adding one commit for each
of the following so the history is accessible.
- BCDA_Data_Dictionary_2021_09_23
- BCDA_Data_Dictionary_2022_01_31
- BCDA_Data_Dictionary_2023_11_17

## ℹ️ Context for reviewers

Modifying the data dictionary to be one file so the changes are tracked
in single file history and updates won't require a deployment and static
site update.

## ✅ Acceptance Validation

Manually verified file commits/changes, ran locally, verified in [stage
environment](https://stage.bcda.cms.gov/data.html#bcda-data-dictionary).

## 🔒 Security Implications

- [ ] This PR adds a new software dependency or dependencies.
- [ ] This PR modifies or invalidates one or more of our security
controls.
- [ ] This PR stores or transmits data that was not stored or
transmitted before.
- [ ] This PR requires additional review of its security implications
for other reasons.

If any security implications apply, add Jason Ashbaugh (GitHub username:
StewGoin) as a reviewer and do not merge this PR without his approval.

_includes/data/data_dictionary.html

@@ -1,6 +1,6 @@
 <div>
   <p>
-    BCDA provides <a href="/assets/data/BCDA_Data_Dictionary_2023_11_17.xlsx" target="blank" class="in-text__link">CCLF to BCDA Data Dictionary</a> to customers to facilitate their data mapping process.
+    BCDA provides <a href="/assets/data/BCDA_Data_Dictionary.xlsx" target="blank" class="in-text__link">CCLF to BCDA Data Dictionary</a> to customers to facilitate their data mapping process.
   </p>
   <p>
     <strong> The Data Dictionary was last updated in November 2023. </strong>