Update version-check paths (#10118)

Teleport source code is not checked out in /drone/src, it is checked out
in /go/src/github.com/gravitational/teleport by an earlier step. As
such, we need to use that as our base.

.drone.yml

@@ -4998,7 +4998,7 @@ steps:
   - name: Check if tag is prerelease
     image: golang:1.17-alpine
     commands:
-      - cd build.assets/version-check
+      - cd /go/src/github.com/gravitational/teleport/build.assets/version-check
       - go run . -tag ${DRONE_TAG} -check prerelease || (echo '---> Not publishing ${DRONE_REPO} packages to RPM and DEB repos' && exit 78)
 
   - name: Download RPM repo contents
@@ -5079,7 +5079,7 @@ steps:
   - name: Check if tag is latest
     image: golang:1.17-alpine
     commands:
-      - cd build.assets/version-check
+      - cd /go/src/github.com/gravitational/teleport/build.assets/version-check
       - go run . -tag ${DRONE_TAG} -check latest || (echo '---> Not publishing ${DRONE_REPO} packages to DEB repo' && exit 78)
 
   - name: Download DEB repo contents
@@ -5192,6 +5192,6 @@ volumes:
       name: drone-s3-debrepo-pvc
 ---
 kind: signature
-hmac: 99a2fb84d52277bf71a7c325b55b3a7ff9e61a820a11603a7a741ba83b100e98
+hmac: 545ff7529ef63acaf7e2fb71b14a1bf577931fc06c247c5485b52ea16f3c18c8
 
 ...