Updated path in docker command in INSTALL.md file
Updated path in docker command in INSTALL.md file

The commit 14a24001c2c9f3430ac38f40d7748a5cff6ac52c changed the path to the `tpm2-tss` directory inside the docker container from `/tpm2-tss` to `/tmp/tpm2-tss`, but the `INSTALL.md` instructions weren't updated. This PR fixes this.

Signed-off-by: da3627dea6d8b8542adc4059b6445e9df399e94c@gmx.de

01org/TPM2.0-TSS,tpm2-software/tpm2-tss,01org/tpm2-tss,tpm2-software/tpm2-tss,01org/tpm2-tss,01org/tpm2-tss,01org/TPM2.0-TSS,01org/TPM2.0-TSS,01org/TPM2.0-TSS,tpm2-software/tpm2-tss