Restore README.txt as circuitpython_build_tools requires it.

lesamouraipourpre · lesamouraipourpre · commit 06e229a28a14 · 2021-05-20T14:35:23.000+01:00
diff --git a/README.txt b/README.txt
@@ -0,0 +1,2 @@
+See here for more info: https://github.com/adafruit/CircuitPython_Community_Bundle
+See VERSIONS.txt for version info.

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+See here for more info: https://github.com/adafruit/CircuitPython_Community_Bundle`
	`2`	`+See VERSIONS.txt for version info.`