Update contains and hasPrefix/hasSuffix with the correct examples (#8929)

**What this PR does / why we need it**:
WHAT:
- Update examples for `contains` and `hasSuffix`
- Correct order should be `functionName arg1 arg2 argN`, eg. `contains s
src`

WHY:
- Current example for `contains` and `hasPrefix` / `hasSuffix` has a
wrong order that will cause `TemplateFormatErr`.
- Examples I'm referring to `{{ if .err hasSuffix "Timeout" }} timeout
{{end}}`

**Checklist**
- [ ] Reviewed the
[`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md)
guide (**required**)
- [ ] Documentation added
- [ ] Tests updated
- [ ] `CHANGELOG.md` updated
- [ ] Changes that require user attention or interaction to upgrade are
documented in `docs/sources/upgrading/_index.md`

docs/sources/logql/template_functions.md

@@ -269,7 +269,7 @@ Signature: `contains(s string, src string) bool`
 Examples:
 
 ```template
-{{ if .err contains "ErrTimeout" }} timeout {{end}}
+{{ if contains .err "ErrTimeout" }} timeout {{end}}
 {{ if contains "he" "hello" }} yes {{end}}
 ```
 
@@ -285,7 +285,7 @@ Signatures:
 Examples:
 
 ```template
-{{ if .err hasSuffix "Timeout" }} timeout {{end}}
+{{ if hasSuffix .err "Timeout" }} timeout {{end}}
 {{ if hasPrefix "he" "hello" }} yes {{end}}
 ```
 
@@ -758,4 +758,4 @@ Examples:
 ```template
 "{{ .foo | duration_seconds }}"
 `{{ duration_seconds .foo }}`
-```
+```