docs/Dockerfile: switch jerboa-* clone URLs to sr.ht ~lisp

ober

de4e726937f74ed87376db8a33c4a2bbc7e89ae8

diff --git a/Dockerfile b/Dockerfile
index 39e0d61..bbc0f37 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -120,9 +120,9 @@ RUN git clone --depth 1 https://github.com/ober/gherkin.git && \
     git clone --depth 1 https://github.com/ober/chez-crypto.git && \
     git clone --depth 1 https://github.com/ober/chez-ssl.git && \
     git clone --depth 1 https://github.com/ober/chez-https.git && \
-    git clone --depth 1 https://github.com/ober/jerboa-awk.git && \
-    git clone --depth 1 https://github.com/ober/jerboa-sed.git && \
-    git clone --depth 1 https://github.com/ober/jerboa-aws.git && \
+    git clone --depth 1 https://git.sr.ht/~lisp/jerboa-awk && \
+    git clone --depth 1 https://git.sr.ht/~lisp/jerboa-sed && \
+    git clone --depth 1 https://git.sr.ht/~lisp/jerboa-aws && \
     git clone --depth 1 https://github.com/ober/chez-fuse.git && \
     git clone --depth 1 https://github.com/ober/chez-scintilla.git && \
     git clone --depth 1 https://github.com/ober/chez-pcre2.git
diff --git a/docs/compiling-gerbil-projects.md b/docs/compiling-gerbil-projects.md
index 63df4fa..4ccfc0c 100644
--- a/docs/compiling-gerbil-projects.md
+++ b/docs/compiling-gerbil-projects.md
@@ -8,7 +8,7 @@ Scheme project and compiling it to run on Chez Scheme via Jerboa.
 1. **Chez Scheme 10.x** with threads (`./configure --threads && make && make install`)
 2. **Jerboa** built and ready:
    ```bash
-   git clone https://github.com/ober/jerboa ~/src/jerboa
+   git clone https://git.sr.ht/~lisp/jerboa ~/src/jerboa
    cd ~/src/jerboa && make
    ```
 3. **Gerbil source tree** (for the modules your project imports):
diff --git a/docs/jerboa-edge.md b/docs/jerboa-edge.md
index 9dafa02..737ddbb 100644
--- a/docs/jerboa-edge.md
+++ b/docs/jerboa-edge.md
@@ -618,12 +618,12 @@ one file.
 
 ### Phase 1: Core Demo (the ~380-line file) — COMPLETE
 
-**Deliverable:** [`jerboa-edge/edge.ss`](https://github.com/ober/jerboa-edge)
+**Deliverable:** [`jerboa-edge/edge.ss`](https://git.sr.ht/~lisp/jerboa-edge)
 
 A single file that a developer can clone and run:
 
 ```bash
-git clone https://github.com/ober/jerboa-edge
+git clone https://git.sr.ht/~lisp/jerboa-edge
 cd jerboa-edge
 make run
 
diff --git a/docs/quickstart.md b/docs/quickstart.md
index 8ec47e0..66be364 100644
--- a/docs/quickstart.md
+++ b/docs/quickstart.md
@@ -19,7 +19,7 @@ Verify: `scheme --version` should print 10.x or later.
 ## 2. Get Jerboa
 
 ```bash
-git clone https://github.com/ober/jerboa.git
+git clone https://git.sr.ht/~lisp/jerboa
 cd jerboa
 ```
 
diff --git a/docs/tutorial.md b/docs/tutorial.md
index 69fca96..7aeb194 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -21,7 +21,7 @@ Jerboa program — the project's CI verifies that.
 - A clone of Jerboa with `bin/jerboa` on your `PATH`:
 
 ```bash
-git clone https://github.com/ober/jerboa.git
+git clone https://git.sr.ht/~lisp/jerboa
 cd jerboa
 make build
 export PATH="$PWD/bin:$PATH"