docs: retire github.com/ober refs → git.sr.ht/~lisp/ChezScheme

ober

f3d2f16aac0292b54be797bfb241dd674829877d

diff --git a/README.md b/README.md
index 7f0d555..bb62a50 100644
--- a/README.md
+++ b/README.md
@@ -520,7 +520,7 @@ Property-based testing is available via `(std test check)`:
 
 - [Chez Scheme](https://cisco.github.io/ChezScheme/) 10.x (stock,
   unmodified — though we maintain an additive fork at
-  [github.com/ober/ChezScheme](https://github.com/ober/ChezScheme)
+  [git.sr.ht/~lisp/ChezScheme](https://git.sr.ht/~lisp/ChezScheme)
   with a handful of pure-Scheme primitives that the standard
   library uses). Both work.
 - Optional: [Rust toolchain](https://rustup.rs/) for building
diff --git a/lib/std/text/base64.ss b/lib/std/text/base64.ss
index 7cd1438..bb05efa 100644
--- a/lib/std/text/base64.ss
+++ b/lib/std/text/base64.ss
@@ -3,7 +3,7 @@
 ;;;
 ;;; Override for static jsh builds. The upstream (std text base64) is a
 ;;; thin wrapper over Chez core base64-encode/base64-decode (Round 12
-;;; Phase 66). Some Chez builds — notably the ober/ChezScheme tree
+;;; Phase 66). Some Chez builds — notably the ~lisp/ChezScheme tree
 ;;; cloned inside jerboa21/jerboa — ship boot files that predate Phase
 ;;; 66, so the host scheme has the prims but the container scheme does
 ;;; not. Rather than chase boot-file regen across hosts, this file
diff --git a/vendor/ChezScheme-patches/0021-makefiles-Makefile.in-add-sync-upstream-sync-upstrea.patch b/vendor/ChezScheme-patches/0021-makefiles-Makefile.in-add-sync-upstream-sync-upstrea.patch
index c1fcf4d..356c9f2 100644
--- a/vendor/ChezScheme-patches/0021-makefiles-Makefile.in-add-sync-upstream-sync-upstrea.patch
+++ b/vendor/ChezScheme-patches/0021-makefiles-Makefile.in-add-sync-upstream-sync-upstrea.patch
@@ -7,7 +7,7 @@ MIME-Version: 1.0
 Content-Type: text/plain; charset=UTF-8
 Content-Transfer-Encoding: 8bit
 
-Our fork (github.com/ober/ChezScheme) carries 50+ local commits on top
+Our fork (git.sr.ht/~lisp/ChezScheme) carries 50+ local commits on top
 of cisco/ChezScheme main — Round 12+ phases (base64, bytevector-append,
 sha1/sha256-bytevector, etc.), jerboa-perf, secure, and the Round 13/14
 plans. Pulling in upstream bug fixes by hand was a multi-step dance of
@@ -46,7 +46,7 @@ index ccada5e1..0c0083c6 100644
  	+ $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) -DZUO_LIB_PATH='"'"$(upsrcdir)/zuo/lib"'"' -o $(ZUO) $(srcdir)/zuo/zuo.c
 +
 +# ── Sync from upstream Cisco ChezScheme ──────────────────────────────────────
-+# Our fork (github.com/ober/ChezScheme) carries local commits on top of
++# Our fork (git.sr.ht/~lisp/ChezScheme) carries local commits on top of
 +# upstream/main (Round 12+ phases, jerboa-perf, secure, etc.). These targets
 +# add an `upstream` remote pointing at cisco/ChezScheme and rebase our main
 +# onto it so we pull in upstream bug fixes without losing local work.
diff --git a/vendor/ChezScheme/makefiles/Makefile.in b/vendor/ChezScheme/makefiles/Makefile.in
index 0c0083c..7ba080e 100644
--- a/vendor/ChezScheme/makefiles/Makefile.in
+++ b/vendor/ChezScheme/makefiles/Makefile.in
@@ -171,7 +171,7 @@ $(ZUO_TARGET): $(srcdir)/zuo/zuo.c
 	+ $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) -DZUO_LIB_PATH='"'"$(upsrcdir)/zuo/lib"'"' -o $(ZUO) $(srcdir)/zuo/zuo.c
 
 # ── Sync from upstream Cisco ChezScheme ──────────────────────────────────────
-# Our fork (github.com/ober/ChezScheme) carries local commits on top of
+# Our fork (git.sr.ht/~lisp/ChezScheme) carries local commits on top of
 # upstream/main (Round 12+ phases, jerboa-perf, secure, etc.). These targets
 # add an `upstream` remote pointing at cisco/ChezScheme and rebase our main
 # onto it so we pull in upstream bug fixes without losing local work.