dep: bump sbt to 1.7.1

Looking at the
[commit](fa063b6)
that added 1.6.2 I believe I have everything updated that needs to be. I
am updating this because it's needed for a test that I'm adding in #15565,
but thought it'd be best to do this bump in a separate pr.

Author: ckipp01

community-build/src/scala/dotty/communitybuild/projects.scala

@@ -140,7 +140,7 @@ final case class SbtCommunityProject(
       case Some(ivyHome) => List(s"-Dsbt.ivy.home=$ivyHome")
       case _ => Nil
     extraSbtArgs ++ sbtProps ++ List(
-      "-sbt-version", "1.6.2",
+      "-sbt-version", "1.7.1",
       "-Dsbt.supershell=false",
       s"-Ddotty.communitybuild.dir=$communitybuildDir",
       s"--addPluginSbtFile=$sbtPluginFilePath"
@@ -507,8 +507,8 @@ object projects:
   lazy val scalaJava8Compat = SbtCommunityProject(
     project        = "scala-java8-compat",
     // the fnGen subproject must be built with 2.12.x
-    sbtTestCommand = s"++2.12.14; ++$compilerVersion; set fnGen/dependencyOverrides := Nil; test",
-    sbtPublishCommand = s"++2.12.14; ++$compilerVersion; set fnGen/dependencyOverrides := Nil; publishLocal",
+    sbtTestCommand = s"++2.12.14; ++$compilerVersion!; set fnGen/dependencyOverrides := Nil; test",
+    sbtPublishCommand = s"++2.12.14; ++$compilerVersion!; set fnGen/dependencyOverrides := Nil; publishLocal",
     scalacOptions = Nil // avoid passing Scala 3 options to Scala 2.12 in fnGen subproject
   )
 

project/build.properties

@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.7.1

sbt-test/sbt-dotty/dotty-knowledge.i17/project/build.properties

@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.7.1

semanticdb/project/build.properties

@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.7.1

tests/cmdTest-sbt-tests/sourcepath-with-inline-api-hash/project/build.properties

@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.7.1

tests/cmdTest-sbt-tests/sourcepath-with-inline/project/build.properties

@@ -1 +1 @@
-sbt.version=1.6.2
+sbt.version=1.7.1