docs: add a note for opentel/jaeger on windows

Jaeger doesn't have a Windows docker image yet and therefore users need to use the EXE instead. This commit adds a side-note for Windows users. Signed-off-by: Anthony Nandaa <[email protected]>
FlaminHOT7 · May 30, 2024 · 53e4d0f · 53e4d0f
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@@ -800,6 +800,10 @@ export JAEGER_TRACE=0.0.0.0:6831
 # any buildctl command should be traced to http://127.0.0.1:16686/
 ```
 
+> On Windows, if you are running Jaeger outside of a container, [`jaeger-all-in-one.exe`](https://www.jaegertracing.io/docs/1.57/getting-started/#all-in-one),
+> set the environment variable `setx -m JAEGER_TRACE "0.0.0.0:6831"`,
+> restart `buildkitd` in a new terminal and the traces will be collected automatically.
+
 ## Running BuildKit without root privileges
 
 Please refer to [`docs/rootless.md`](docs/rootless.md).