Ownership docs: Update the docs to reflect the right command. (#161)

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## What was changed
- Update the ownership transfer command to now reflect the right
command. Previously, it was passing the value for the key
`temporal.io/ignore-last-modifier` as the boolean true.
- This was wrong because the controller expects the value to be a
string.

## Why?
- Correctness.

## Checklist
<!--- add/delete as needed --->

1. Closes <!-- add issue number here -->

2. How was this tested:
- Wasn't tbh

3. Any docs updates needed?
<!--- update README if applicable
      or point out where to update docs.temporal.io -->

Author: Shivs11

docs/ownership.md

@@ -24,18 +24,34 @@ for the Worker Controller to take over, you can update the metadata to indicate
 There is no Temporal server support for Worker Deployment Version-level metadata, so you'll have to set this value on
 the Current Version of your Worker Deployment.
 
+Note: The controller decodes this metadata value as a string. Be sure to set the value to the string "true" (not the boolean true).
+
+```bash
+temporal worker deployment update-metadata-version \
+   --deployment-name $MY_DEPLOYMENT \
+   --build-id $CURRENT_VERSION_BUILD_ID \
+   --metadata 'temporal.io/ignore-last-modifier="true"'
+```
+Alternatively, if your CLI supports JSON input:
 ```bash
 temporal worker deployment update-metadata-version \
    --deployment-name $MY_DEPLOYMENT \
-   --build-id $CURRENT_VERSION_BUILD_ID
-   --metadata 'temporal.io/ignore-last-modifier=true'`
+   --build-id $CURRENT_VERSION_BUILD_ID \
+   --metadata-json '{"temporal.io/ignore-last-modifier":"true"}'
 ```
 In the rare case that you have a nil Current Version when you are passing back ownership, you should set it on your Ramping Version
 ```bash
 temporal worker deployment update-metadata-version \
    --deployment-name $MY_DEPLOYMENT \
-   --build-id $RAMPING_VERSION_BUILD_ID
-   --metadata 'temporal.io/ignore-last-modifier=true'`
+   --build-id $RAMPING_VERSION_BUILD_ID \
+   --metadata 'temporal.io/ignore-last-modifier="true"'
+```
+Or with JSON:
+```bash
+temporal worker deployment update-metadata-version \
+   --deployment-name $MY_DEPLOYMENT \
+   --build-id $RAMPING_VERSION_BUILD_ID \
+   --metadata-json '{"temporal.io/ignore-last-modifier":"true"}'
 ```
 
 In the even rarer case that you have nil Current Version and nil Ramping Version, you'll need to use the CLI or SDK to