Update .bingo/README.md (#1186)

I have been bitten by this too many times (i.e. running `bingo`
commands in the .bingo directory). I wanted to make sure no one
else falls into the same confusion.

Signed-off-by: Todd Short <[email protected]>

Author: tmshort

.bingo/README.md

@@ -2,8 +2,8 @@
 
 This is directory which stores Go modules with pinned buildable package that is used within this repository, managed by https://github.com/bwplotka/bingo.
 
-* Run `bingo get` to install all tools having each own module file in this directory.
-* Run `bingo get <tool>` to install <tool> that have own module file in this directory.
+* Run `bingo get` (in the repo root) to install all tools having each own module file in this directory.
+* Run `bingo get <tool>` (in the repo root) to install <tool> that have own module file in this directory.
 * For Makefile: Make sure to put `include .bingo/Variables.mk` in your Makefile, then use $(<upper case tool name>) variable where <tool> is the .bingo/<tool>.mod.
 * For shell: Run `source .bingo/variables.env` to source all environment variable for each tool.
 * For go: Import `.bingo/variables.go` to for variable names.