Documentation: Update template_functions.md (#11615)

Fix incorrect example

**What this PR does / why we need it**:
Fix incorrect example in [Template
functions](https://grafana.com/docs/loki/latest/query/template_functions/)

**Special notes for your reviewer**:

**Checklist**
- [x] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [x] Documentation added
- [ ] Tests updated
- [ ] `CHANGELOG.md` updated
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- [ ] If the change is deprecating or removing a configuration option,
update the `deprecated-config.yaml` and `deleted-config.yaml` files
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Co-authored-by: J Stickler <[email protected]>
Co-authored-by: Michel Hollands <[email protected]>

docs/sources/query/template_functions.md

@@ -470,7 +470,7 @@ Signature: `min(a interface{}, i ...interface{}) int64`
 Example:
 
 ```template
-{{ max 1 2 3 }} //output 1
+{{ min 1 2 3 }} //output 1
 ```
 
 ## maxf