fix a typo in tor-spec.txt
treec21c0b1c7bc53d0f7277eb982b607800c18a1c54
-rw-r--r-- 2378 address-spec.txt
-rw-r--r-- 10910 bridges-spec.txt
-rw-r--r-- 19949 control-spec-v0.txt
-rw-r--r-- 73114 control-spec.txt
-rw-r--r-- 13203 dir-spec-v1.txt
-rw-r--r-- 41907 dir-spec-v2.txt
-rw-r--r-- 79965 dir-spec.txt
-rw-r--r-- 19750 path-spec.txt
drwxr-xr-x - proposals
-rw-r--r-- 35344 rend-spec.txt
-rw-r--r-- 3283 socks-extensions.txt
-rw-r--r-- 44786 tor-spec.txt
-rw-r--r-- 2152 version-spec.txt