lower the build version requirement to allow static checks to pass

Signed-off-by: 'Stanislav Maksimov' <[email protected]>

build.env

@@ -17,7 +17,7 @@
 source ./tools/shell_functions.inc
 
 go version >/dev/null 2>&1 || fail "Go is not installed or is not in \$PATH. See https://vitess.io/contributing/build-from-source for install instructions."
-goversion_min 1.19.10 || fail "Go version reported: `go version`. Version 1.19.10+ required. See https://vitess.io/contributing/build-from-source for install instructions."
+goversion_min 1.18.7 || fail "Go version reported: `go version`. Version 1.18.7+ required. See https://vitess.io/contributing/build-from-source for install instructions."
 
 mkdir -p dist
 mkdir -p bin